Three-phase intelligent power supply circuit

Abstract

The utility model belongs to the technical field of three-phase power supply circuits, and particularly discloses a three-phase intelligent power supply circuit, which comprises a chip U5A, a pin 48 of the chip U5A is connected with a first control circuit, the first control circuit comprises a diode D10 and a capacitor C46 which are arranged in parallel, and a starting circuit of a motor MOTORU is connected with the pin 48 of the chip U5A through the diode D10 and the capacitor C46 which are connected in parallel. A pin 43 of the chip U5A is connected with a second control circuit, the second control circuit comprises a diode D11 and a capacitor C48 which are arranged in parallel, and a starting circuit of the motor MOTORV is connected with the pin 43 of the chip U5A through the diode D11 and the capacitor C48 which are connected in parallel. According to the utility model, through integrated braking of the three control circuits, all motors can be turned on at the same time, through chips of gallium nitride field effect transistors, circuit loss is reduced, output efficiency is improved, conversion efficiency is improved by 1-2% under the condition that device cost is not increased, and heat dissipation cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-phase power supply circuits, and particularly relates to a three-phase intelligent power supply circuit. Background Art

[0002] Intelligent Power Module (IPM) is the abbreviation of Intelligent Power Module. It uses the power switching device IGBT (Insulated Gate Bipolar Transistor), and has the advantages of high current density, low saturation voltage and high voltage resistance of GTR (High Power Transistor), as well as the advantages of high input impedance, high switching frequency and low drive power of MOSFET (Field Effect Transistor).

[0003] However, compared with the chip of gallium nitride field effect transistor, the IGBT chip of the existing IPM has higher circuit loss and reduced output power.

[0004] Therefore, it is very necessary to invent a three-phase intelligent power supply circuit to solve the above problems. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides a three-phase intelligent power supply circuit to solve the problems put forward in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A three-phase intelligent power supply circuit includes a chip U5A. The pin 48 of the chip U5A is connected to a first control circuit. The first control circuit includes a diode D10 and a capacitor C46 connected in parallel. The starting circuit of the motor MOTOR_U is connected to the pin 48 of the chip U5A through the parallel-connected diode D10 and capacitor C46. The pin 43 of the chip U5A is connected to a second control circuit. The second control circuit includes a diode D11 and a capacitor C48 connected in parallel. The starting circuit of the motor MOTOR_V is connected to the pin 43 of the chip U5A through the parallel-connected diode D11 and capacitor C48. The pin 41 of the chip U5A is connected to a third control circuit. The third control circuit includes a diode D12 and a capacitor C50 connected in parallel. The starting circuit of the motor MOTOR_W is connected to the pin 41 of the chip U5A through the parallel-connected diode D12 and capacitor C50. The power supply voltage 15V is connected to the pin 65 of the chip U5A through a resistor R106.

[0007] Further, the pins 50, 51, 52, 53, 54, 55, 56 and 57 of the chip U5A are all connected to the motor MOTOR_U port.

[0008] Further, pin 42, pin 45, pin 56, pin 47 and pin 72 of the chip U5A are all connected to the MOTOR_V port of the motor.

[0009] Further, pin 32, pin 33, pin 34, pin 35, pin 36, pin 37, pin 38 and pin 39 of the chip U5A are all connected to the MOTOR_W port of the motor.

[0010] Further, pin 18 and pin 19 of the chip U5A are connected to the PWM signal generator of the MOTOR_U.

[0011] Further, pin 20 and pin 21 of the chip U5A are connected to the PWM signal generator of the MOTOR_V.

[0012] Further, pin 22 and pin 24 of the chip U5A are connected to the PWM signal generator of the MOTOR_W.

[0013] Technical effects and advantages of the present utility model:

[0014] 1. Through the integrated braking of the three-way control circuit, all motors can be turned on simultaneously in the present utility model. The chip of the gallium nitride field effect transistor is used to reduce the circuit loss and improve the output efficiency. Moreover, under the condition of not increasing the device cost, the conversion efficiency can be increased by 1-2%, and the heat dissipation cost can be reduced. Description of the drawings

[0015] Figure 1 is the three-phase intelligent power circuit diagram of the embodiment of the present utility model. Detailed implementation manners

[0016] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0017] The present utility model provides a three-phase intelligent power circuit, as Figure 1As shown, a three-phase intelligent power circuit includes a chip U5A. The supply voltage of 15V is connected to pin 65 of the chip U5A through a resistor R106. Among them, the chip U5A is set as a chip of a gallium nitride field-effect transistor. The low-state resistance of the chip U5A is 205mΩ. When the ambient temperature = 25°C, RDS turns on, and at this time, the chip U5A conducts. And the open-source pin of the chip U5A supports a current sensor for three-phase shunt, and integrates an amplifier of 11MHz and 15V / μs for a single-shunt current sensor. Through the integrated braking of the three-way control circuit, all motors can be turned on simultaneously. By using the chip of the gallium nitride field-effect transistor, the circuit loss is reduced, the output efficiency is improved, and without increasing the device cost, the conversion efficiency is increased by 1-2%, and the heat dissipation cost can be reduced.

[0018] Pin 48 of the chip U5A is connected to a first control circuit. The first control circuit includes a diode D10 and a capacitor C46 connected in parallel. The startup circuit of the motor MOTOR_U is connected to pin 48 of the chip U5A through the parallel-connected diode D10 and capacitor C46. Pins 50, 51, 52, 53, 54, 55, 56, and 57 of the chip U5A are all connected to the motor MOTOR_U port. Pins 18 and 19 of the chip U5A are connected to the PWM signal generator of the motor MOTOR_U. The PWM signal generator sends a PWM signal to pins 18 and 19 of the chip U5A. The chip U5A converts the PWM signal into a voltage or current signal suitable for the motor MOTOR_U. At this time, the startup circuit of the motor MOTOR_U sends a startup signal of the motor MOTOR_U to the chip U5A through the diode D10 and the capacitor C46. At this time, the motor MOTOR_U works under the control of the suitable voltage or current signal, and the rotation speed of the motor MOTOR_U is controlled according to the voltage or current signal converted from the PWM signal.

[0019] Pin 43 of chip U5A is connected to the second control circuit. The second control circuit includes a diode D11 and a capacitor C48 connected in parallel. The startup circuit of motor MOTOR_V is connected to pin 43 of chip U5A through the parallel-connected diode D11 and capacitor C48. Pins 42, 45, 56, 47, and 72 of chip U5A are all connected to the motor MOTOR_V port. Pins 20 and 21 of chip U5A are connected to the PWM signal generator of motor MOTOR_V. The PWM signal generator sends a PWM signal to pins 20 and 21 of chip U5A. Chip U5A converts the PWM signal into a voltage or current signal suitable for motor MOTOR_V. At this time, the startup circuit of motor MOTOR_V sends a startup signal of motor MOTOR_V to chip U5A through diode D11 and capacitor C48. At this time, motor MOTOR_V works under the control of the suitable voltage or current signal, and the rotation speed of motor MOTOR_V is controlled according to the voltage or current signal converted from the PWM signal.

[0020] Pin 41 of chip U5A is connected to the third control circuit. The third control circuit includes a diode D12 and a capacitor C50 connected in parallel. The startup circuit of motor MOTOR_W is connected to pin 41 of chip U5A through the parallel-connected diode D12 and capacitor C50. Pins 32, 33, 34, 35, 36, 37, 38, and 39 of chip U5A are all connected to the motor MOTOR_W port. Pins 22 and 24 of chip U5A are connected to the PWM signal generator of motor MOTOR_W. The PWM signal generator sends a PWM signal to pins 22 and 24 of chip U5A. Chip U5A converts the PWM signal into a voltage or current signal suitable for motor MOTOR_W. At this time, the startup circuit of motor MOTOR_W sends a startup signal of motor MOTOR_W to chip U5A through diode D12 and capacitor C50. At this time, motor MOTOR_W works under the control of the suitable voltage or current signal, and the rotation speed of motor MOTOR_W is controlled according to the voltage or current signal converted from the PWM signal.

[0021] The working principle of the present utility model:

[0022] Refer to Figure 1As shown in the figure, the PWM signal generator sends PWM signals to pins 18 and 19 of chip U5A. Chip U5A converts the PWM signals into voltage or current signals suitable for motor MOTOR_U. At this time, the startup circuit of motor MOTOR_U sends a startup signal of motor MOTOR_U to chip U5A through diode D10 and capacitor C46. At this time, motor MOTOR_U operates under the control of the suitable voltage or current signal, and the rotation speed of motor MOTOR_U is controlled according to the voltage or current signal converted from the PWM signal.

[0023] The PWM signal generator sends PWM signals to pins 20 and 21 of chip U5A. Chip U5A converts the PWM signals into voltage or current signals suitable for motor MOTOR_V. At this time, the startup circuit of motor MOTOR_V sends a startup signal of motor MOTOR_V to chip U5A through diode D11 and capacitor C48. At this time, motor MOTOR_V operates under the control of the suitable voltage or current signal, and the rotation speed of motor MOTOR_V is controlled according to the voltage or current signal converted from the PWM signal.

[0024] The PWM signal generator sends PWM signals to pins 22 and 24 of chip U5A. Chip U5A converts the PWM signals into voltage or current signals suitable for motor MOTOR_W. At this time, the startup circuit of motor MOTOR_W sends a startup signal of motor MOTOR_W to chip U5A through diode D12 and capacitor C50. At this time, motor MOTOR_W operates under the control of the suitable voltage or current signal, and the rotation speed of motor MOTOR_W is controlled according to the voltage or current signal converted from the PWM signal.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A three-phase intelligent power supply circuit, characterized in that: It includes chip U5A. Pin 48 of the chip U5A is connected to the first control circuit. The first control circuit includes a diode D10 and a capacitor C46 connected in parallel. The starting circuit of the motor MOTOR_U is connected to pin 48 of the chip U5A through the parallel-connected diode D10 and capacitor C46. Pin 43 of the chip U5A is connected to the second control circuit. The second control circuit includes a diode D11 and a capacitor C48 connected in parallel. The starting circuit of the motor MOTOR_V is connected to pin 43 of the chip U5A through the parallel-connected diode D11 and capacitor C48. Pin 41 of the chip U5A is connected to the third control circuit. The third control circuit includes a diode D12 and a capacitor C50 connected in parallel. The starting circuit of the motor MOTOR_W is connected to pin 41 of the chip U5A through the parallel-connected diode D12 and capacitor C50. The supply voltage of 15V is connected to pin 65 of the chip U5A through a resistor R106.

2. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 50, 51, 52, 53, 54, 55, 56 and 57 of the chip U5A are all connected to the motor MOTOR_U port.

3. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 42, 45, 56, 47 and 72 of the chip U5A are all connected to the motor MOTOR_V port.

4. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 32, 33, 34, 35, 36, 37, 38 and 39 of the chip U5A are all connected to the motor MOTOR_W port.

5. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 18 and 19 of the chip U5A are connected to the PWM signal generator of the motor MOTOR_U.

6. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 20 and 21 of the chip U5A are connected to the PWM signal generator of the motor MOTOR_V.

7. The three-phase intelligent power supply circuit according to claim 1, characterized in that: Pins 22 and 24 of the chip U5A are connected to the PWM signal generator of the motor MOTOR_W.

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