Filtering circuit for restraining electromagnetic disturbance for permanent magnet direct current motor
A DC motor, electromagnetic disturbance technology, applied in the direction of suppressing electromagnetic interference, electric components, DC commutator, etc., can solve the problem of brush and commutator spark electromagnetic disturbance, etc., to weaken conduction and radiation disturbance output, electromagnetic disturbance inhibiting effect
Inactive Publication Date: 2009-11-18
无锡江南微电机厂
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Problems solved by technology
[0005] The purpose of the present invention is to provide a filter circuit for suppressing electromagnetic disturbance of a permanent magnet DC motor, which solves the problem of electromagnetic disturbance caused by sparks generated between the brushes and the commutator plates of the permanent magnet DC motor used on the circuit breaker
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[0011] like figure 1 As shown, the electromagnetic disturbance suppression filter circuit of the permanent magnet DC motor according to the present invention includes capacitors C1, C2, C3, inductors L1, L2 and a series-connected motor, capacitors C1 and C2 are connected in series, capacitors C3 and inductors L2 are connected in series, and the capacitors are connected in series. The other end of C1 and C3 is connected to the cathode of the power supply, the other end of the capacitor C2 and the other end of the inductor L2 is connected to the anode of the power supply, after the motor is connected in series with the inductor L1, the other end of L1 is connected to the cathode of the power supply, and the other end of the motor is connected between the capacitor C3 and the inductor L2 , and the lead wire between capacitors C1 and C2 is grounded.
[0012] Among them, C1, C2, and L1 are used to suppress common mode disturbance, and C3 and L2 are used to suppress differential mod...
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The invention discloses a filtering circuit for restraining electromagnetic disturbance for a permanent magnet direct current motor, which comprises capacitors C1, C2 and C3, inductors L1 and L2 and a serial-in motor. The capacitors C1 and C2 are connected in series; the capacitor C3 and the inductor L2 are connected in series; the other ends of the capacitors C1 and C3 are connected with a power cathode; the other ends of the capacitor C2 and the inductor L2 are connected with a power anode; and after the motor is connected with the inductor L1 in series, the other end of L1 is connected with the power cathode, and the other end of the motor is connected between the capacitor C3 and the inductor L2, wherein a conducting wire is led out between the capacitors C1 and C2 and is grounded. The filtering circuit has the advantages that restraining to the electromagnetic disturbance is realized, and transmission to the electric network side and radiation disturbance output are weakened.
Description
technical field [0001] The invention relates to a filter circuit for suppressing electromagnetic disturbance of a permanent magnet DC motor. Background technique [0002] The permanent magnet DC motor is a drive motor used by a medium and low voltage circuit breaker as a spring energy storage. It requires the motor to be a permanent magnet DC motor with an output power of 50W and an output speed of 20 rpm. Due to the rapid development of circuit breaker technology, its technological content is getting higher and higher, and its electronic equipment and instruments are getting higher and higher precision, so new technical requirements are also put forward for the drive motor requirements. In particular, limit requirements are put forward for the electromagnetic interference of the motor. This product achieves the above purpose by developing an electromagnetic compatibility technology that suppresses the electromagnetic disturbance of DC motors. [0003] The permanent magnet...
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IPC IPC(8): H02K11/00H02K23/66H02K11/02
Inventor 陈伯金陈渊技
Owner 无锡江南微电机厂