Cooperative control method for energy conversion apparatus, storage medium, and vehicle

Patent metadata

Field	Value
Publication number	US-12040727-B2
Application number	US-202017764038-A
Country	US
Kind code	B2
Filing date	Aug 18, 2020
Priority date	Sep 25, 2019
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A cooperative control method is disclosed. The cooperative control method includes: acquiring a target heating power, a target driving power, and a target charging and discharging power; acquiring a first heating power of a motor coil according to the target charging and discharging power; acquiring a second heating power of the motor coil according to the target driving power; adjusting a first quadrature axis current and a first direct axis current to a target quadrature axis current and a target direct axis current to cause the difference between the sum of the first heating power and the second heating power and the target heating power to be within the preset range; and acquiring a sampling current value on each phase coil and a motor rotor position, and calculating a duty cycle of each phase bridge arm in a reversible PWM rectifier according to the above information.

First claim

What is claimed is:

1. A cooperative control method for an energy conversion apparatus, wherein
the energy conversion apparatus comprises a reversible pulse width modulation (PWM) rectifier and a motor coil; the reversible PWM rectifier is connected with the motor coil; a positive electrode end and a negative electrode end of an external battery are respectively connected with a first bus terminal and a second bus terminal of the reversible PWM rectifier; a first end and a second end of an external charging and discharging port are respectively connected with at least one neutral line led out from the motor coil and the second bus terminal of the reversible PWM rectifier; and
the cooperative control method comprises:
acquiring a target heating power, a target driving power, and a target charging and discharging power;
acquiring, according to the target charging and discharging power, a target charging and discharging current outputted from the external charging and discharging port to the neutral line, and acquiring a first heating power of the motor coil according to the target charging and discharging current;
acquiring, according to the target driving power, a first quadrature axis current and a first direct axis current in a synchronous rotating reference frame based on a motor rotor field orientation, and acquiring a second heating power of the motor coil according to the first quadrature axis current and the first direct axis current;
respectively adjusting the first quadrature axis current and the first direct axis current to a target quadrature axis current and a target direct axis current according to the target driving power, such that a difference between a sum of the first heating power and the second heating power and the target heating power is within a preset range; and
acquiring a sampling current value on each phase coil and a motor rotor position, and calculating a duty cycle of each phase bridge arm in the reversible PWM rectifier according to the target quadrature axis current, the target direct axis current, the target charging and discharging current, the sampling current value on each phase coil, and the motor rotor position.

2. The cooperative control method according to claim 1 , wherein after the acquiring the second heating power of the motor coil according to the first quadrature axis current and the first direct axis current, the method further comprises:
respectively setting the first quadrature axis current and the first direct axis current as the target quadrature axis current and the target direct axis current, when the difference between the sum of the first heating power and the second heating power and the target heating power is within the preset range.

3. The cooperative control method according to claim 1 , wherein
when the target charging and discharging power is zero, the target charging and discharging current and the first heating power are zero, and the cooperative control method comprises:
acquiring the target heating power and the target driving power;
acquiring, according to the target driving power, the first quadrature axis current and the first direct axis current in the synchronous rotating reference frame based on the motor rotor field orientation, and acquiring the second heating power of the motor coil according to the first quadrature axis current and the first direct axis current;
respectively adjusting the first quadrature axis current and the first direct axis current to the target quadrature axis current and the target direct axis current according to the target driving power, such that a difference between the second heating power and the target heating power is within the preset range;
respectively setting the first quadrature axis current and the first direct axis current as the target quadrature axis current and the target direct axis current when the difference between the second heating power and the target heating power is within the preset range; and
acquiring the sampling current value on each phase coil and the motor rotor position, and calculating the duty cycle of each phase bridge arm in the reversible PWM rectifier according to the target quadrature axis current, the target direct axis current, the sampling current value on each phase coil, and the motor rotor position; or

when the target heating power is zero, the cooperative control method comprises:
acquiring the target charging and discharging power and the target driving power;
acquiring, according to the target charging and discharging power, the target charging and discharging current outputted from the external charging and discharging port to the neutral line;
acquiring the first quadrature axis current and the first direct axis current according to the target driving power, and respectively setting the first quadrature axis current and the first direct axis current as the target quadrature axis current and the target direct axis current; and
acquiring the sampling current value on each phase coil and the motor rotor position, and calculating the duty cycle of each phase bridge arm in the reversible PWM rectifier according to the target quadrature axis current, the target direct axis current, the target charging and discharging current, the sampling current value on each phase coil, and the motor rotor position; or

when the target driving power is zero, the cooperative control method comprises:
acquiring the target heating power and the target charging and discharging power;
acquiring, according to the target charging and discharging power, the target charging and discharging current outputted from the external charging and discharging port to the neutral line, and acquiring the first heating power of the motor coil according to the target charging and discharging current;
acquiring the target quadrature axis current and the target direct axis current according to the target heating power and the first heating power; and
acquiring the sampling current value on each phase coil and the motor rotor position, and calculating the duty cycle of each phase bridge arm in the reversible PWM rectifier according to the target quadrature axis current, the target direct axis current, the target charging and discharging current, the sampling current value on each phase coil, and the motor rotor position.

4. The cooperative control method according to claim 1 , wherein the acquiring, according to the target charging and discharging power, the target charging and discharging current outputted from the external charging and discharging port to the neutral line comprises:
acquiring, according to the target charging and discharging power, a target voltage of an external power supply connected to the external charging and discharging port, when the external power supply is in a constant current charging and discharging mode; acquiring an actual voltage of the charging and discharging port, and acquiring a voltage difference according to the target voltage and the actual voltage of the charging and discharging port; and performing closed-loop control on the voltage difference to acquire the target charging and discharging current outputted to the neutral line; or
acquiring, according to the target charging and discharging power, a current of the external charging and discharging port as the target charging and discharging current outputted from the external charging and discharging port to the neutral line, when the external power supply connected to the external charging and discharging port is in a constant voltage charging and discharging mode.

5. The cooperative control method according to claim 1 , wherein the acquiring, according to the target driving power, a first quadrature axis current and a first direct axis current in a synchronous rotating reference frame based on a motor

Assignees

• Byd Co Ltd

Inventors

• Lian Yubo
• Ling Heping
• Li Jicheng
• Pan Hua
• Mou Li

Classifications

• B60L58/10

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• Y02E60/10

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• Y02T10/72

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• Y02T10/70

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• Y02T10/64

  Electric machine technologies in electromobility · CPC title