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WO1987002840A1 - Circuit d'antiparasitage - Google Patents

Circuit d'antiparasitage Download PDF

Info

Publication number
WO1987002840A1
WO1987002840A1 PCT/DE1986/000382 DE8600382W WO8702840A1 WO 1987002840 A1 WO1987002840 A1 WO 1987002840A1 DE 8600382 W DE8600382 W DE 8600382W WO 8702840 A1 WO8702840 A1 WO 8702840A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit arrangement
connection
arrangement according
interference suppression
capacitor
Prior art date
Application number
PCT/DE1986/000382
Other languages
German (de)
English (en)
Inventor
Wilfried Falk
Josef FÖRSTERA
Berthold Seng
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1987002840A1 publication Critical patent/WO1987002840A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/005—Reducing noise, e.g. humm, from the supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
    • H02P7/293—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC using phase control

Definitions

  • the invention relates to a circuit arrangement for interference suppression of electrical consumers according to the preamble of the main claim.
  • a circuit arrangement for interference suppression of a phase control of an AC-powered consumer with a series with the consumer, controllable in both current directions via a control circuit switch and a suppression choke and a parallel to the switch Ent interference capacitor is known.
  • the switch for the consumer is connected in parallel from a suppressor, an auxiliary switch which can be controlled in both current directions by a control circuit, and a current limiting resistor.
  • the switch for the consumer is switched through each half-wave, lagging behind the auxiliary switch. As a result, the main current for the no longer flows through the suppressor choke Consumer, but a relatively small auxiliary current.
  • the circuit arrangement according to the invention has the advantage that the occurrence of faults is effectively prevented with minimal circuit complexity.
  • the interference suppression is achieved by an at least high-frequency connection between the electrical mass of the consumer and that power supply connection from which the consumer is disconnected during the blocking period of the switch.
  • the connection must be effective at least in the frequency range in which the interference lies. They are then derived with low resistance.
  • a capacitor is provided between the two power supply connections to suppress symmetrical interference on the supply lines.
  • two capacitors are provided directly on the consumer, which form a high-frequency short circuit to the electrical ground.
  • the circuit is particularly suitable for cost-effective interference suppression of electric motors, the speed of which can be changed by periodically opening and closing the controllable switch. It can be permanently excited motors or universal motors.
  • Figure 1 shows the circuit arrangement according to the invention for interference suppression of a universal motor
  • Figure 2 shows the circuit arrangement according to the invention for interference suppression of a permanently excited motor. Description of the embodiment
  • FIG. 1 shows a universal motor 10 with a first motor connection 11 and a second motor connection 12. It has an internal inductance 13, 14 of the armature winding and the field winding.
  • the first and the second motor connection 11, 12 are each connected to the electrical motor mass 17 via a capacitor 15, 16. It is also connected to a first power supply connection 20 via a series connection consisting of a capacitor 18 and a resistor 19. Between this first connection 20 and the first motor connection 11 is a controllable switch 21 which has a control connection 22.
  • a second power supply connection 23 is connected to the second motor connection 12. Both connections
  • FIG. 2 shows a circuit arrangement for suppressing a permanently excited motor 30. It has a first and second motor connection 31, 32, an internal inductance 33, 34 of the armature winding, and the electrical motor mass 35.
  • the first and second motor connections 31, 32 are connected to a rectifier arrangement 36.
  • the other components correspond to those that are already shown in FIG. 1.
  • the rectifier arrangement 36 is via the controllable switch
  • the circuit arrangement according to FIG. 1 works as follows:
  • the interference suppression is shown here using the example of a universal motor 10, which is housed in an electrically conductive housing, which represents the electrical motor mass 17. Instead of the electric motor, any other electrical consumer can be provided which has a device mass 17.
  • the armature winding of the universal motor 10 has an inductance which is composed of two parts 13, 14 in the electrical equivalent circuit.
  • the inductance of the excitation winding, not shown, is already contained in the inductance 13, 14.
  • the operating current of the universal motor 10 can be switched with the controllable switch 21, which is connected between the first motor connection 11 and at the first connection 20.
  • the switch 21 is preferably a semiconductor switch, for example a triac.
  • the middle line of the universal motor 10 is varied by periodically switching the triac 21 via its control input 22, which results in a speed control.
  • the control circuit which generates ignition pulses at the control input 22 of the triac 21, consists in the simplest case of an RC element and a diac, the RC element being connected to the first connection 20 and to the first motor connection 11. It may also be necessary to relieve the triac 21 by means of a relief network connected in parallel with it.
  • the relief network is a series circuit consisting of a capacitor and a resistor, which is also connected to the first connection 20 and to the first motor connection 11. An alternating voltage for supplying power to the universal motor 10 should be provided between the two connections 20, 23.
  • Triac 21 are replaced by a semiconductor component which can be switched on via a control input and can be switched off via a further control input. With AC voltage, the triac 21 locks itself at zero current.
  • symmetrical interference voltages can arise between the two connections 20, 23, which are short-circuited with the capacitor 2k; it is also referred to as an X capacitor.
  • asymmetrical interference voltages can occur on the one hand between the first motor connection 11 and the electrical ground 17 and on the other hand between the second motor connection 12 and the ground 17.
  • These interference voltages are short-circuited by the capacitor 15 or the capacitor 16. They are also called Y capacitors.
  • the interference suppression with the X capacitor 24 and the two Y capacitors 15, 16 is in many cases not sufficient.
  • An interference filter is then required, which is connected between the supply source and the two connections 20, 23.
  • the Y capacitors 15, 16 and the capacitor 18 must not exceed certain capacitance values, since if the grounding of the electrical motor mass 17 or the motor housing fails, an inadmissibly high leakage current to the ground would occur. If the electrical consumer 10, including the electrical device mass 17, is designed to be completely touch-proof, it is also possible to save the capacitor 18. In the simplest arrangement, it is even possible to do without the resistor 19. However, it is expediently present since it dampens high-frequency vibrations. Its resistance value should be a few 10 to a few 100 ohms.
  • the two Y capacitors 15, 16 and the capacitor 18 have typical capacitance values of 10 nF and the X capacitor 24 have a typical capacitance value of 100 nF.
  • the X capacitor 24 can also have a lower capacitance value if the required level of interference suppression has already been reached. In this circuit arrangement, the value is reduced in any case compared to the previously required values.
  • FIG. 2 shows the circuit arrangement for suppressing a permanently excited motor 30.
  • the main difference from the circuit arrangement according to FIG. 1 is that the first and second motor connections 31, 32 are not connected directly to the triac 21 or to the connection 23, but that a rectifier arrangement 30 is provided in between.
  • the permanently excited motor 30 is thereby fed with a pulsating direct current, which can be switched using the triac 21.
  • the mode of operation of the interference voltage suppression is the same as in the circuit according to FIG. 1.
  • effective interference suppression could previously only be achieved with greater effort.
  • the rectifier arrangement 36 and the additional wiring required bring additional parasitic inductances into the circuit, which represent a barrier to the cooking frequency.
  • the circuit arrangement is not limited to the interference suppression of electric motors, it is equally suitable for other electrical consumers, the average power of which can be changed by phase control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

Circuit pour l'antiparasitage de consommateurs de courant dont la puissance électrique moyenne est modifiable au moyen d'une commande par coupure de phases. Un simple antiparasitage est obtenu en reliant la masse (17) de l'appareil électrique, au moins au niveau des hautes fréquences, avec le branchement électrique (20) duquel le consommateur est séparé pendant le temps de repos du commutateur (21) amorçable par une commande. Avec un simple montage en série constitué d'un condensateur (18) et d'une résistance (19) entre la masse (17) et le premier branchement (20), on obtient une dérivation antiparasites de faible impédance pendant le temps de repos. Le circuit ci-décrit est particulièrement indiqué pour le déparasitage de moteurs électriques dont la vitesse de rotation est commandée par coupure de phases, car jusqu'à présent on ne pouvait prévenir qu'à grands frais les parasites se produisant dans le moteur électrique (10, 30) pendant la phase de repos du commutateur (21). On fait ainsi l'économie de moyens d'antiparasitages onéreux et encombrants.
PCT/DE1986/000382 1985-11-02 1986-09-19 Circuit d'antiparasitage WO1987002840A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3538949.4 1985-11-02
DE19853538949 DE3538949A1 (de) 1985-11-02 1985-11-02 Entstoerschaltung

Publications (1)

Publication Number Publication Date
WO1987002840A1 true WO1987002840A1 (fr) 1987-05-07

Family

ID=6285040

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000382 WO1987002840A1 (fr) 1985-11-02 1986-09-19 Circuit d'antiparasitage

Country Status (4)

Country Link
JP (1) JPS63501839A (fr)
AU (1) AU6376486A (fr)
DE (1) DE3538949A1 (fr)
WO (1) WO1987002840A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016467A1 (fr) * 1994-11-23 1996-05-30 Firma J. Eberspächer Mecanisme d'entrainement electrique
US7019425B2 (en) * 2003-07-23 2006-03-28 Sintertechnik Gmbh Device for noise suppressing of small electric motors

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4107373A1 (de) * 1991-03-08 1992-09-10 Thomson Brandt Gmbh Verfahren und vorrichtung zur abschwaechung von stoersignalen
DE29613462U1 (de) * 1996-07-25 1997-11-20 Black & Decker Inc., Newark, Del. Elektrisches Gerät mit einem Elektromotor
US6381153B1 (en) * 1999-04-20 2002-04-30 Hill-Rom Services, Inc. Method and apparatus of EMI filtering that eliminates the need for an inductor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR824499A (fr) * 1936-07-18 1938-02-09 British Electrical & Allied In Perfectionnements relatifs aux moyens pour la suppression de perturbations électriques de haute fréquence
US2227125A (en) * 1940-04-11 1940-12-31 Gen Electric Electric protective apparatus
DE722286C (de) * 1934-03-08 1942-07-06 Siemens Ag Anordnung zur Verminderung der Beruehrungsgefahr bei betriebsmaessig nicht geerdeten Starkstromgeraeten
CH580356A5 (en) * 1973-08-22 1976-09-30 Mefina Sa Housing for electrical motor foot operated control circuit - has cover which is hinged on two rollers through which pin is passed and which fixes cover to base

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE722286C (de) * 1934-03-08 1942-07-06 Siemens Ag Anordnung zur Verminderung der Beruehrungsgefahr bei betriebsmaessig nicht geerdeten Starkstromgeraeten
FR824499A (fr) * 1936-07-18 1938-02-09 British Electrical & Allied In Perfectionnements relatifs aux moyens pour la suppression de perturbations électriques de haute fréquence
US2227125A (en) * 1940-04-11 1940-12-31 Gen Electric Electric protective apparatus
CH580356A5 (en) * 1973-08-22 1976-09-30 Mefina Sa Housing for electrical motor foot operated control circuit - has cover which is hinged on two rollers through which pin is passed and which fixes cover to base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996016467A1 (fr) * 1994-11-23 1996-05-30 Firma J. Eberspächer Mecanisme d'entrainement electrique
US7019425B2 (en) * 2003-07-23 2006-03-28 Sintertechnik Gmbh Device for noise suppressing of small electric motors

Also Published As

Publication number Publication date
AU6376486A (en) 1987-05-19
JPS63501839A (ja) 1988-07-21
DE3538949A1 (de) 1987-05-14

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