INTEGRATED MOTOR DRIVE AND BATTERY CHARGING SYSTEM

• US 20130069492A1
• Filed: 05/17/2012
• Published: 03/21/2013
• Est. Priority Date: 11/17/2009
• Status: Active Grant

• Current Assignee: Webasto Charging Systems, Inc. (Webasto Beteiligungs Verwaltung Gbr)
• Original Assignee: Aerovironment
• Inventors: Rippel, Wally Ewald, Berman, Scott Garret
• Granted Patent: US 9,018,809 B2
• Time in Patent Office: Days
• US Class Current: 310/68.D
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/24 Using the vehicle's propulsion converter for charging
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

In one possible embodiment, a motor charging system for connection with a battery is provided having a rotor and a stator. The stator has delta H-bridge connected windings. The delta H-bridge includes an inverter at one side and a switching means at another side with each winding being connected between inverter pole switches and switching means pole switches. An A/C power port is connected to the windings such that when the switching means is off the A/C power port is connected to the battery bus via the windings and the inverter.

Claims

1. An integrated power conversion system for a vehicle, the integrated motor power conversion system comprising:

a) a rotor;

b) a stator comprising windings connected together connected at a neutral node;

c) an inverter connected between a battery bus and the windings;

d) single phase A/C power connector; and

e) switches connected in the windings so as to be capable of disconnecting two of the windings from the neutral node and connecting the two windings to the single phase A/C power connector.

2. The system of claim 1, further comprising a means to inhibit rotor movement during recharge.

3. The system of claim 2, wherein the means to inhibit rotor movement comprises a rotor blocking mechanism

4. The system of claim 2, wherein the means to inhibit rotor movement comprises a means to withdraw the rotor from within the stator.

5. The system of claim 2, wherein the means to inhibit rotor movement comprises a means to open circuit the rotor.

6. The system of claim 5, wherein the rotor is a squirrel cage rotor comprising shorting rings, and wherein the means to inhibit rotor movement comprises a means to open circuit the shorting rings.

7. The system of claim 2, wherein the means to inhibit rotor movement comprises a means to inhibit coupling between the stator and the rotor.

8. The system of claim 7, wherein the means to inhibit coupling between the stator and the rotor comprises a shield between the stator and the rotor.

9. The system of claim 7, wherein the means to inhibit coupling between the stator and the rotor comprises a conductive sleeve.

10. An integrated power conversion system for a vehicle, the integrated power conversion system comprising:

a) a rotor;

b) a stator comprising windings connected together connected at a neutral node;

c) an inverter between a battery bus and the stator;

d) an A/C power connector;

e) switches connected in the windings so as to be capable of disconnecting the windings from the neutral node and connecting the windings to the A/C power connector for battery charging through the winding; and

f) a motor casing means for inhibiting capacitive charging of the vehicle by the motor during battery charging.

11. The system of claim 10, wherein the motor casing means for inhibiting capacitive charging of the vehicle comprises a motor casing comprising a non-conducting material.

12. The system of claim 10, wherein the motor casing means for inhibiting capacitive charging of the vehicle comprises a non-conductive motor mounts.

13. The system of claim 10 further comprising a non-conductive rotor shaft.

14. The system of claim 10 further comprising a non-conductive rotor shaft coupling.

15. An integrated power conversion system for a vehicle, the integrated power conversion system comprising:

a) a rotor;

b) a stator comprising a delta H-bridge connected windings comprising;

i) an inverter comprising a first set of pairs of switches connected across a battery bus, a first end of each winding being connected between a respective pair of switches; and

ii) a second set of pairs of switches connected across the battery bus in parallel with the first set of switches, a second end of each winding being connected between a respective pair of switches; and

c) an A/C power port connected to the second end of each winding.

16. The system of claim 15 further comprising interphase transformers connected between the windings and the inverter.

17. The system of claim 15 further comprising a DC power port connected to the battery bus.

18. An integrated motor and battery charging system, the integrated motor and battery charging system comprising:

a) a rotor;

b) a stator comprising a delta H-bridge connected windings comprising;

i) an inverter;

ii) a switching means connected across the battery bus in parallel with the inverter; and

iii) the windings being connected between the inverter and the switching means; and

c) an A/C power port connected to the windings such that when the switching means is open circuited the A/C power port is connected to the battery bus via the windings and the inverter.

19. The system of claim 18 further comprising interphase transformers connected between the windings and the inverter.

20. The system of claim 18 further comprising a DC power port connected to the battery bus.

21. The system of claim 18, wherein each winding is connected between pole switches of the inverter and pole switches of the switching means.