Disclosed is a drive system for induction motor, including a two-phase induction motor, a power source filter circuit, an H-bridge power drive circuit and a controller MCU. The power source filter circuit is configured to filter out harmonic components of a DC power source, and generate a power sour
Disclosed is a drive system for induction motor, including a two-phase induction motor, a power source filter circuit, an H-bridge power drive circuit and a controller MCU. The power source filter circuit is configured to filter out harmonic components of a DC power source, and generate a power source midpoint voltage required for driving; the controller MCU is configured to generate a switch control signal required for operation of the H-bridge power drive circuit; the H-bridge power drive circuit is configured to generate a drive current and transfer the drive current to the two-phase induction motor; and the two-phase induction motor is configured to receive the drive current generated by the H-bridge power drive circuit.
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1. A drive system for induction motor, comprising a two-phase induction motor, a power source filter circuit, an H-bridge power drive circuit and a controller MCU, wherein the power source filter circuit is configured to filter out harmonic components of a Direct Current (DC) power source, and gener
1. A drive system for induction motor, comprising a two-phase induction motor, a power source filter circuit, an H-bridge power drive circuit and a controller MCU, wherein the power source filter circuit is configured to filter out harmonic components of a Direct Current (DC) power source, and generate a power source midpoint voltage required for driving;the controller MCU is configured to generate a switch control signal required for operation of the H-bridge power drive circuit;the H-bridge power drive circuit is configured to generate a drive current and transfer the drive current to the two-phase induction motor;the H-bridge power drive circuit comprises an H bridge consisting of a power semiconductor transistor Q1, a power semiconductor transistor Q2, a power semiconductor transistor Q3 and a power semiconductor transistor Q4;a drain of the power semiconductor transistor Q1 is connected to an output of the DC power source, a source of the power semiconductor transistor Q1 is connected to a drain of the power semiconductor transistor Q3 to form a bridge arm endpoint U, a source of the power semiconductor transistor Q3 is connected to ground, and a gate of the power semiconductor transistor Q1 and a gate of the power semiconductor transistor Q3 are connected respectively to the controller MCU, a drain of the power semiconductor transistor Q2 is connected to the output of the DC power source, a source of the power semiconductor transistor Q2 is connected to a drain of the power semiconductor transistor Q4 to form a bridge arm endpoint V, a source of the power semiconductor transistor Q4 is connected to the ground, and a gate of the power semiconductor transistor Q2 and a gate of the power semiconductor transistor Q4 are connected respectively to the controller MCU;one endpoint of a winding L1 of the two-phase induction motor is connected to one endpoint of another winding L2 of the two-phase induction motor to form a middle point;the middle point of the two phase windings is connected to the middle point of a capacitor C0 and a capacitor C1; the capacitor C0 and the capacitor C1 are configured to filter out the current harmonics of the DC power source, and form the middle point of the DC power source;an endpoint of the winding L1 is connected to the bridge arm endpoint U and an endpoint of the winding L2 is connected to the bridge arm endpoint V; andthe two-phase induction motor is thus configured to receive the drive current generated by the H-bridge power drive circuit. 2. The drive system for induction motor according to claim 1, wherein each of the capacitors C0 and C1 is a double-filtering capacitor, the double-filtering capacitor C0 and the double-filtering capacitor C1 are connected in series, one end of the power source filter circuit is connected to the DC power source and the other end of the power source filter circuit is connected to the ground. 3. The drive system for induction motor according to claim 2, wherein a sampling resistor RS0 is connected between the double-filtering capacitor C1 and the ground. 4. The drive system for induction motor according to claim 2, wherein the double-filtering capacitor C0 and the double-filtering capacitor C1 are of the same capacitance. 5. The drive system for induction motor according to claim 2, wherein the middle point between the winding L1 and the winding L2 of the two-phase induction motor is connected to a middle point N of the power source formed by C0 and C1. 6. The drive system for induction motor according to claim 5, further comprising a resistor R1, a resistor R3, a resistor R5, a resistor R7, a resistor R2, a resistor R4, a resistor R6 and a resistor R8, wherein the resistor R1, the resistor R2, the resistor R5 and the resistor R6 are arranged respectively between the controller MCU and a respective gate of the power semiconductor transistor Q1, the power semiconductor transistor Q2, the power semiconductor transistor Q3 and the power semiconductor transistor Q4; and the resistor R3, the resistor R4, the resistor R7 and the resistor R8 are arranged respectively between a respective gate and a respective source of the power semiconductor transistor Q1, the power semiconductor transistor Q2, the power semiconductor transistor Q3 and the power semiconductor transistor Q4. 7. The drive system for induction motor according to claim 1, wherein the middle point between the winding L1 and the winding L2 of the two-phase induction motor is connected to a middle point N of the power source. 8. The drive system for induction motor according to claim 7, further comprising a resistor R1, a resistor R3, a resistor R5, a resistor R7, a resistor R2, a resistor R4, a resistor R6 and a resistor R8, wherein the resistor R1, the resistor R2, the resistor R5 and the resistor R6 are arranged respectively between the controller MCU and a respective gate of the power semiconductor transistor Q1, the power semiconductor transistor Q2, the power semiconductor transistor Q3 and the power semiconductor transistor Q4; and the resistor R3, the resistor R4, the resistor R7 and the resistor R8 are arranged respectively between a respective gate and a respective source of the power semiconductor transistor Q1, the power semiconductor transistor Q2, the power semiconductor transistor Q3 and the power semiconductor transistor Q4.
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이 특허에 인용된 특허 (8)
Labriola ; II Donald P., Digital motor driver circuit and method.
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