Motor driving and battery charging apparatus and vehicle

Patent metadata

Field	Value
Publication number	US-10744898-B2
Application number	US-201715827502-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Aug 24, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A motor driving and battery charging apparatus is provided. The apparatus includes a motor having a plurality of coils, a rectifier circuit connected to the plurality of coils, and a high voltage battery. An inverter generates a driving current from an output voltage of the high voltage battery and supplies the driving current to the motor while the motor operates. While the high voltage battery is charged, the rectifier circuit rectifies an alternating current (AC) of an external power source, the motor and the inverter compensate for a power factor of the current rectified by the rectifier circuit, and the high voltage battery is charged with an output current of the motor and the inverter.

First claim

What is claimed is:

1. A motor driving and battery charging apparatus, comprising:
a motor including a plurality of coils;
a rectifier circuit connected to the plurality of coils;
a high voltage battery;
an inverter configured to generate a driving current from an output voltage of the high voltage battery and supply the driving current to the motor, while the motor operates,
wherein while the high voltage battery is charged:
the rectifier circuit is configured to rectify an alternating current (AC) of an external power source;
the motor and the inverter are configured to compensate for a power factor of the current rectified by the rectifier circuit; and
the high voltage battery is charged with an output current of the motor and the inverter;

a high direct current (DC) convertor (HDC) configured to increase the output voltage of the high voltage battery while the motor operates;
a DC link capacitor configured to apply the voltage increased by the HDC to the inverter;
a low voltage battery;
a low DC-DC convertor (LDC) configured to reduce the output voltage of the high voltage battery and apply the reduced voltage to the low voltage battery;
a three winding transformer having a first coil and a third coil; and
a full bridge circuit configured to generate an AC current from the output voltage of the high voltage battery and output the AC current to the first coil,
wherein the third coil is connected to the HDC,
wherein while the high voltage battery is charged, the DC link capacitor is charged with the output current of the motor and the inverter;
wherein while the high voltage battery is charged, the HDC is configured to generate an AC current from an output voltage of the DC link capacitor and output the AC current to the third coil; and
wherein while the high voltage battery is charged, the full bridge circuit is configured to rectify an AC current output from the first coil and output the rectified current to the high voltage battery.

2. The apparatus of claim 1 , further comprising:
a first switch disposed between the rectifier circuit and the plurality of coils; and
a controller configured to turn the first switch off while the motor operates, and turn the first switch on while the high voltage battery is charged.

3. The apparatus of claim 1 , wherein the LDC includes:
a second coil; and
a low AC-DC rectifier circuit configured to rectify an AC current output from the second coil and output the rectified current to the low voltage battery.

4. The apparatus of claim 1 , further comprising:
a first switch disposed between the rectifier circuit and the plurality of coils;
a second switch disposed between the high voltage battery and the HDC; and
a third switch disposed between the third coil and the HDC.

5. The apparatus of claim 4 , further comprising a controller configured to operate the first switch, the second switch, and the third switch, wherein:
while the motor operates, the controller is configured to turn the first switch off, turn the second switch on, and turn the third switch off; and
while the high voltage battery is charged, the controller is configured to turn the first switch on, turn the second switch off, and turn the third switch on.

6. A motor driving and battery charging apparatus, comprising:
a rectifier circuit configured to rectify an alternating current (AC) supplied from an external power source;
a power factor corrector including a plurality of coils disposed in a motor and a plurality of driving switches disposed in an inverter, and configured to compensate for a power factor of the current rectified by the rectifier circuit;
a high voltage battery charged with a current output from the power factor corrector,
wherein, while the motor operates, the inverter is configured to generate a driving current from an output voltage of the high voltage battery and supply the driving current to the motor;
a high direct current (DC) convertor (HDC) configured to increase the output voltage of the high voltage battery while the motor operates;
a DC link capacitor configured to apply the voltage increased by the HDC to the inverter;
a low voltage battery;
a low DC-DC convertor (LDC) configured to reduce the output voltage of the high voltage battery and apply the reduced voltage to the low voltage battery;
a three winding transformer having a first coil and a third coil; and
a full bridge circuit configured to generate an AC current from the output voltage of the high voltage battery and output the AC current to the first coil,
wherein the third coil is connected to the HDC,
wherein while the high voltage battery is charged, the DC link capacitor is charged with the output current of the motor and the inverter;
wherein the high voltage battery is charged, the DC is configured to generate an AC current from an output voltage of the DC link capacitor and output the AC current to the third coil; and
wherein while the high voltage battery is charged, the full bridge circuit is configured to rectify an AC current output from the first coil and output the rectified current to the high voltage battery.

7. The apparatus of claim 6 , further comprising:
a first switch disposed between the rectifier circuit and the plurality of coils; and
a controller configured to turn the first switch off while the motor operates, and turn the first switch on while the high voltage battery is charged.

8. The apparatus of claim 6 , further comprising:
a direct current (DC) link capacitor charged with the current output from the power factor corrector; and
an isolated DC-DC converter configured to change an output voltage of the DC link capacitor and output the changed output voltage to the high voltage battery.

9. The apparatus of claim 8 , wherein the isolated DC-DC converter includes:
a three winding transformer having a first coil and a second coil;
a primary transformer circuit configured to generate an AC current from the output voltage of the DC link capacitor and output the AC current to the first coil; and
a secondary circuit configured to rectify the AC current output from the second coil and output the rectified current to the high voltage battery.

10. The apparatus of claim 9 , wherein:
while the motor operates, the primary transformer circuit is connected to the high voltage battery and is configured to increase the output voltage of the high voltage battery; and
while the motor operates, the DC link capacitor is configured to apply the voltage increased by the primary transformer circuit to the inverter.

11. The apparatus of claim 9 , further comprising:
a first switch disposed between the rectifier circuit and the plurality of coils;
a second switch disposed between the high voltage battery and the HDC; and
a third switch disposed between the third coil and the HDC.

12. The apparatus of claim 11 , further comprising a controller configured to operate the first switch, the second switch, and the third switch, wherein:
while the high voltage battery is charged, the controller is configured to turn the first switch on, turn the second switch off, and turn the third switch on; and
while the motor operates, the controller is configured to turn the first switch off, turn the second switch on, and turn the third switch off.

13. A vehicle, comprising:
a wheel;
a motor configured to rotate the wheel and including a plurality of coils;
a rectifier circuit configured to rectify an alternating current (AC) supplied from an external power source, and connected to the plurality of coils;
a high voltage battery;
an inverter configured to generate a driving current from

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Yang Jin Myeong
• Lee Woo Young
• Kim Jun Ho
• Yang Sihun
• Kim Youngjin
• Cha Jae Eun
• Lee Dae Woo
• Yeo Inyong

Classifications

• H02J2105/37

  exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV] · CPC title

• B60L58/12

  responding to state of charge [SoC] · CPC title

• B60L53/20 Primary

  characterised by converters located in the vehicle · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• B60Y2200/91

  Electric vehicles · CPC title