Drive apparatus and electric vehicle
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsXuejuan Kong, Ningbo Feng, Xing Zhang
Life of this patent
Estimating the term…
Abstract
A drive apparatus includes a control chip, a watchdog chip, a drive logic circuit, and a plurality of drive chips. The control chip is connected to the watchdog chip and the drive logic circuit, and is configured to determine a PWM signal of each switch and output the PWM and a first signal to the drive logic circuit. The watchdog chip is connected to the drive logic circuit, and is configured to send a second signal. The first and the second pin of the drive chip are connected to the drive logic circuit. The third pin is configured to connect to a corresponding switch, and adjust a drive signal of the connected switch based on the received drive control signal and the received enable signal generated by the drive logic circuit.
Claims20
A drive apparatus comprising:
- a control chip configured to:
- receive an operation parameter of a motor of an electric vehicle;
- generate a drive torque based on the operation parameter;
- generate pulse-width modulation (PWM) signals of switches in an inverter of the electric vehicle based on the drive torque;
- output the PWM signals;
- and
- send, when the drive torque is abnormal or the operation parameter exceeds a first specified range, a first signal representing that the drive torque is abnormal or the motor operates abnormally;
- a watchdog chip connected to the control chip and configured to:
- perform fault monitoring on the control chip;
- and
- send, when the control chip is faulty, a second signal representing that the control chip is faulty;
- a drive logic circuit connected to the control chip and the watchdog chip and configured to:
- receive the PWM signals and the first signal from the control chip;
- receive the second signal from the watchdog chip;
- generate drive control signals and enable signals of the switches based on the PWM signals, the first signal, and the second signal;
- and
- output the drive control signals and the enable signals;
- and
- drive chips connected to the drive logic circuit and comprising first pins connected to the drive logic circuit, second pins connected to the drive logic circuit, and third pins configured to connect to the switches, wherein the drive chips are configured to:
- receive the drive control signals through the first pins;
- receive the enable signals through the second pins;
- and
- adjust, based on the drive control signals and the enable signals, drive signal outputs to the switches.
An electric vehicle comprising:
- a motor configured to output a drive torque;
- an inverter connected to the motor, comprising switches, and configured to supply power to the motor in response to a drive signal;
- and
- a drive apparatus connected to the inverter, configured to provide the drive signal to the inverter, and comprising:
- a control chip configured to:
- receive an operation parameter of the motor;
- generate the drive torque based on the operation parameter;
- generate pulse-width modulation (PWM) signals of the switches based on the drive torque;
- output the PWM signals;
- and
- send, when the drive torque is abnormal or the operation parameter exceeds a first specified range, a first signal representing that the drive torque is abnormal or the motor operates abnormally;
- a watchdog chip connected to the control chip and configured to:
- perform fault monitoring on the control chip;
- and
- send, when the control chip is faulty, a second signal representing that the control chip is faulty;
- a drive logic circuit connected to the control chip and the watchdog chip and configured to:
- receive the PWM signals and the first signal from the control chip;
- receive the second signal from the watchdog chip;
- generate drive control signals and enable signals of the switches based on the PWM signals, the first signal, and the second signal;
- and
- output the drive control signals and the enable signals;
- and
- drive chips connected to the drive logic circuit and comprising first pins connected to the drive logic circuit, second pins connected to the drive logic circuit, and third pins configured to connect to the switches, wherein the drive chips are configured to:
- receive the drive control signals through the first pins;
- receive the enable signals through the second pins;
- and
- adjust, based on the drive control signals and the enable signals, drive signal outputs to the switches.
Dependencies are inferred from the claim text.