Electric generator for electric vehicle
A vehicle includes a first prime mover and a first prime mover driven transmission. A vehicle drive system for the vehicle includes an electric energy source, an electric motor in direct or indirect mechanical communication with the first prime mover, and a high power generator coupled to the electric motor. The electric motor is configured to generate energy for storage in the energy source via rotation using power from the first prime mover and drives the generator using energy from the electric energy source.
1 . A vehicle drive system for a vehicle, the vehicle drive system comprising:
a first electric energy storage system configured to provide energy at a first voltage;
a second electric energy storage system configured to provide energy at a second voltage, the first voltage and the second voltage being higher than 250 volts;
a direct current voltage to direct current voltage converter disposed between the first electric energy storage system and the second electric energy storage system;
a first electric motor, wherein the first electric energy storage system is configured to provide power to the first electric motor for rotating wheels of the vehicle, and wherein the second electric energy storage system is configured to provide power for power exportation or for an accessory, wherein the first motor is configured to generate energy for storage in the first electric energy storage system via rotation;
a second electric motor configured to drive other loads using energy from the second electric energy storage system, the second electric motor being configured to drive a generator, hydraulic motor, pump, or compressor using energy from the second electric energy storage system; and
a control system configured to transfer energy between the first electric energy storage system and the second electric energy storage system to achieve a desired driving range and a desired energy for the accessory or for power exportation and wherein the control system is configured to rotate the second electric motor at a selected speed for driving the generator, hydraulic motor, pump, or compressor using energy from the second electric energy storage system.
2 . The vehicle drive system of claim 1 , further comprising a high power generator coupled to the second electric motor, wherein the second electric motor is configured to generate energy for storage in the first electric energy storage system via rotation using power from a first prime mover and drives the high power generator using energy from the second electric energy storage system.
3 . The vehicle drive system of claim 1 , wherein the second electric motor is in direct or indirect mechanical communication with a power take off.
4 . The vehicle drive system of claim 1 , the first electric energy storage system is configured to be charged from an external source.
5 . The vehicle drive system of claim 4 , wherein the external source is a grid.
6 . The vehicle drive system of claim 1 , wherein the first electric energy storage system is configured to be charged from an external source via a single plug, wherein the second electric energy storage system configured to be charged via the direct current voltage to direct current voltage converter and not directly via the single plug.
7 . The vehicle drive system of claim 6 , wherein the single plug is a level 2 J1772 interface.
8 . The vehicle drive system of claim 1 , wherein the first voltage is above 350 V or greater and the second voltage is 350 V or less.
9 . The vehicle drive system of claim 1 , further comprising:
a power take off configured to be in mechanical communication with the second electric motor, and to drive using power from the second electric motor and a first prime mover to provide surge power.
10 . The vehicle drive system of claim 1 , wherein the direct current voltage to direct current voltage converter comprises a bidirectional direct current voltage to direct current voltage converter and is a 20 kW converter.
11 . The vehicle drive system of claim 1 , wherein the direct current voltage to direct current voltage converter comprises a bidirectional direct current voltage to direct current voltage converter and comprises a power inverter.
12 . The vehicle drive system of claim 1 , wherein the energy is shifted from the second electric energy storage system to the first electric energy storage system if the control system determines there may be insufficient energy to achieve the desired driving range.
13 . The vehicle drive system of claim 1 , wherein the control system includes an inverter and the first voltage is higher than the second voltage.
14 . The vehicle drive system of claim 1 , wherein the second voltage is 350V.
15 . The vehicle drive system of claim 1 , wherein the energy is shifted from the first electric energy storage system to the second electric energy storage system if the control system determines there may be insufficient energy to power the accessory at a work site.
16 . A vehicle drive system for a vehicle, the vehicle drive system comprising:
a first electric energy storage system configured to provide energy at a first voltage, the first electric energy storage system being a traction battery;
a second electric energy storage system configured to provide energy at a second voltage, the second voltage being above 250 volts;
a bidirectional direct current voltage to direct current voltage converter disposed between the first electric energy storage system and the second electric energy storage system;
a first electric motor, wherein the first electric energy storage system is configured to provide power to the first electric motor for rotating wheels of the vehicle, and wherein the second electric energy storage system is configured to provide power for power exportation or for an accessory, the accessory being a pump or hydraulic motor;
a second motor configured to drive other loads using energy from the second electric energy storage system; and
a control system configured to transfer energy between the first electric energy storage system and the second electric energy storage system to achieve a desired driving range and a desired energy for the accessory or for power exportation.
17 . The vehicle drive system of claim 16 , wherein the first electric motor is driven by regenerative braking.
18 . The vehicle drive system of claim 16 , wherein the second voltage is 350V.
19 . The vehicle drive system of claim 16 , wherein the energy is shifted from the first electric energy storage system to the second electric energy storage system if the control system determines there may be insufficient energy to power the accessory at a work site.
20 . A vehicle drive system for a vehicle, the vehicle drive system comprising:
a combustion engine;
a first battery electric energy storage system configured to provide energy at a first voltage;
a second battery electric energy storage system configured to provide energy at a second voltage, the first voltage and the second voltage being above 250 volts;
a bidirectional direct current voltage to direct current voltage converter disposed between the first battery electric energy storage system and the second battery electric energy storage system;
a first electric motor configured to rotate wheels of the vehicle using energy from the first battery electric energy storage system, and wherein the second battery electric energy storage system is configured to provide power for power exportation or for an accessory, the accessory being a pump or hydraulic motor;
a second electric motor in direct or indirect mechanical communication with the combustion engine, wherein the second electric motor is configured to generate energy for storage in the second battery electric energy storage system via rotation using power from the combustion engine and configured to drive other loads using energy from the second battery electric energy storage system; and
a control system configured to transfer energy between the first battery electric energy storage system and the second battery electric energy storage system to achieve a desired driving range and a desired energy for the accessory or for power exportation.