ELECTRIC INJECTION MOLDING MACHINE
First Claim
1. A motor driving circuit for driving a motor, comprising:
- a rectifier circuit configured for receiving a first three-phase alternating current (AC) power and for converting the first three-phase AC power to a direct current (DC) power;
a switch control circuit configured for controlling the motor to output a regenerative current in a deceleration period of the motor;
a heater configured for receiving the regenerative current to heat an external device via the switch circuit;
a micro control unit (MCU);
a DC link circuit configured for receiving the DC power from the rectifier circuit, wherein the DC link circuit is configured to be connected to the MCU for supplying voltage to the MCU; and
an inverter circuit configured for receiving the DC power from the DC link circuit and for converting the DC power to a second three-phase AC power to drive the motor;
wherein the MCU outputs a heat control signal according to the voltage from the DC link circuit to turn on the switch control circuit, so as control deceleration of the motor such that a regenerative current from the motor is supplied to the heater to operate.
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Accused Products
Abstract
An electric injection molding machine includes a motor driving circuit for driving a motor, and a delivery pipe. The motor driving circuit includes a rectifier circuit, a switch control circuit, a heater, a direct current (DC) link circuit, and an inverter circuit. The switch control circuit is configured for controlling the motor to output a regenerative current generated in a deceleration period of the motor. The heater is configured for receiving the regenerative current to heat the delivery pipe via the switch control circuit. A micro control unit (MCU) outputs a heat control signal according to the voltage from the DC link circuit to turn on the switch control circuit so as control deceleration of the motor such that a regenerative current from the motor is supplied to the heater to heat the delivery pipe.
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Citations
19 Claims
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1. A motor driving circuit for driving a motor, comprising:
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a rectifier circuit configured for receiving a first three-phase alternating current (AC) power and for converting the first three-phase AC power to a direct current (DC) power; a switch control circuit configured for controlling the motor to output a regenerative current in a deceleration period of the motor; a heater configured for receiving the regenerative current to heat an external device via the switch circuit; a micro control unit (MCU); a DC link circuit configured for receiving the DC power from the rectifier circuit, wherein the DC link circuit is configured to be connected to the MCU for supplying voltage to the MCU; and an inverter circuit configured for receiving the DC power from the DC link circuit and for converting the DC power to a second three-phase AC power to drive the motor; wherein the MCU outputs a heat control signal according to the voltage from the DC link circuit to turn on the switch control circuit, so as control deceleration of the motor such that a regenerative current from the motor is supplied to the heater to operate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electric injection molding machine comprising:
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a delivery pipe for delivering injection material; a motor; a motor driving circuit for driving the motor, the motor driving circuit comprising; a rectifier circuit configured for receiving a first three-phase alternating current (AC) power and for converting the first three-phase AC power to a direct current (DC) power; a switch control circuit configured for controlling the motor to output a regenerative current in a deceleration period of the motor; a heater configured for receiving the regenerative current to heat the delivery pipe via the switch circuit; a micro control unit (MCU); a DC link circuit configured for receiving the DC power from the rectifier circuit, wherein the DC link circuit is configured to be connected to the MCU for supplying voltage to the MCU; and an inverter circuit configured for receiving the DC power from the DC link circuit and for converting the DC power to a second three-phase AC power to drive the motor; wherein the MCU outputs a heat control signal according to the voltage from the DC link circuit to turn on the switch control circuit, so as control deceleration of the motor such that a regenerative current from the motor is supplied to the heater to heat the delivery pipe. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification