DRIVING CIRCUIT FOR SR MOTOR

• Main Author: OH, JAE YUN
• Format: Patent
• Language: English; Korean
• Published: 12.07.2001
• Edition: 7
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PURPOSE: A driving circuit for an SR motor is provided to ensure a stable operation by controlling a switching element using current flowing in a drive motor of an SR motor. CONSTITUTION: Resistances(R1,R2) are connected to a diode(D2) in parallel. A cathode of a diode(D3) is connected to a connection point of the resistances(R1,R2). An anode of the diode(D3) is connected to a control signal input terminal of a switching device(SA). A resistance(R3) is connected to the diode(D3) in parallel. A capacitor(C1) is connected to the control signal input terminal of the switching device(SA) at a side thereof and connected to the anode of the diode(D3) at other side thereof. When a gate drive signal(S2) applied to the switching device(SA) is inputted at a low level, the switching device(SA) is turned off, and a voltage of high level is applied to a node(A) which is a contact point between the resistances(R1,R2). The capacitor(C1) is discharged through resistances(R1,R3). 본 발명은 에스알 모터의 구동회로에 관한 것으로, 종래 에스알 모터는 동작원리의 특성상 소음이 심하다는 문제점이 있었다. 이와 같은 문제점을 감안한 본 발명은 하나의 스위칭 소자에 인가되는 외부신호를 소정시간 지연하여 다른 스위칭 소자를 제어하여 그 스위칭 소자간에 위치하는 권선에 흐르는 전류의 급격한 감소를 완화시켜 에스알 모터의 소음을 감소시키는 지연수단을 간단히 구형함으로써, 소음특성을 향상시키는 효과가 있다.