Integrated motor drive and battery charging system
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.
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.