Brushless motor driving circuit and method
A brushless motor and drive circuit technology, applied in the direction of a single motor speed/torque control, starting device, etc., can solve problems such as affecting the normal operation of the equipment, large starting current, accelerated motor aging, etc., to avoid excessive bus voltage. , Improve the service life and reduce the effect of starting current
Active Publication Date: 2021-01-12
XIAN MICROELECTRONICS TECH INST
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Problems solved by technology
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The invention discloses a brushless motor driving circuit and method. An emitter of a triode Q1 is connected with a capacitor C1, an adjustable resistor R1 and a voltage source power supply negative port, a collector of the triode Q1 is connected with the capacitor C1, the adjustable resistor R1 and a resistor R2 and then connected into a motor control chip U1, and the resistor R2 is connected with a voltage source power supply positive port; the collector of the triode Q1 is connected with the non-inverting input end of the error amplifier, the inverting input end of the triode Q1 is connected with the capacitor C2 and the resistor R3, the capacitor C2 and the resistor R3 are connected with the output end of the error amplifier, the output end of the motor adapter is connected with the inverting input end of the error amplifier, and the output end of the motor adapter is connected with the inverting input end of the first comparator. The resistor R5 is connected with a voltage sourcepower supply positive port, the resistor R5 is connected with an in-phase input end and the capacitor C3, and the capacitor C3 is connected with a voltage source power supply negative port; the firstcomparator is connected with a gate drive signal modulation circuit, and the gate drive signal modulation circuit is connected with a three-phase bridge inverter.
Application Domain
Single motor speed/torque controlStarter arrangements
Technology Topic
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Examples
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Example Embodiment
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