POWER OUTPUT SYSTEM AND CONTROL METHOD THEREOF

• US 20140117886A1
• Filed: 02/01/2013
• Published: 05/01/2014
• Est. Priority Date: 10/31/2012
• Status: Abandoned Application

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Wu, Chien-Hsun
• Application Number:
  US13/757,623
• Publication Number:
  US 20140117886A1
• Time in Patent Office: Days
• US Class Current: 318/46
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2220/44 Wheel Hub motors, i.e. integrated in the wheel hub
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2260/28 Four wheel or all wheel drive
• CPC Class Codes: H02K 16/00 Machines with more than one rotor or stator machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029
• CPC Class Codes: H02K 7/108 with friction clutches
• CPC Class Codes: H02P 5/74 controlling two or more ac dynamo-electric motors H02P5/46, H02P5/60 take precedence
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A power output system includes a first rotary power source, a second rotary power source and a clutch. The first rotary power source has a first maximum torque and a first maximum rotation speed. The second rotary power source has a second maximum torque and a second maximum rotation speed. The second maximum torque is greater than the first maximum torque, and the second maximum rotation speed is lower than the first maximum rotation speed. An output shaft of the second rotary power source is coaxial with an output shaft of the first rotary power source. The clutch is located between the first rotary power source and the second rotary power source. The clutch separates or couples the output shaft of the first rotary power source from or to the output shaft of the second rotary power source.

Claims

1. A power output system, comprising:

a first rotary power source having a first maximum torque and a first maximum rotation speed;

a second rotary power source having a second maximum torque and a second maximum rotation speed, the second maximum torque being greater than the first maximum torque, the second maximum rotation speed being lower than the first maximum rotation speed, and an output shaft of the second rotary power source being coaxial with an output shaft of the first rotary power source; and

a clutch located between the first rotary power source and the second rotary power source, the clutch is configured for separating or coupling the output shaft of the first rotary power source from or to the output shaft of the second rotary power source.

2. The power output system according to claim 1, further comprising a controller electrically connected to the first rotary power source, the second rotary power source and the clutch.

3. The power output system according to claim 1, further comprising a power supply module electrically connected to the first rotary power source, the second rotary power source and the clutch.

4. The power output system according to claim 1, wherein the output shaft of the first rotary power source is connected to a driving wheel.

5. The power output system according to claim 1, further comprising a casing, the first rotary power source, the second rotary power source and the clutch being located inside the casing.

6. A control method of a power output system, comprising steps of:

providing a power output system comprising a first rotary power source, a second rotary power source and a clutch, a maximum torque of the second rotary power source being greater than a maximum torque of the first rotary power source, and a maximum rotation speed of the second rotary power source being lower than a maximum rotation speed of the first rotary power source;

setting a preset rotation speed, and determining whether a rotation speed to be output by the power output system is greater than the preset rotation speed;

if yes, switching off the clutch to separate the first rotary power source from the second rotary power source, and stop the output of the second rotary power source; and

if not, switching on the clutch to coaxially couple the first rotary power source and the second rotary power source for synchronous output.

7. The control method of the power output system according to claim 6, wherein the preset rotation speed is lower than or equal to the maximum rotation speed of the second rotary power source.

8. The control method of the power output system according to claim 6, wherein the step of switching on the clutch to coaxially couple the first rotary power source and the second rotary power source for synchronous output further comprises:

enabling the first rotary power source and the second rotary power source to operate at the same time;

determining whether a difference between the rotation speed of the second rotary power source and the rotation speed of the first rotary power source is lower than or equal to a buffer value;

if yes, switching on the clutch to coaxially couple the first rotary power source and the second rotary power source; and

if not, continuing to increase the rotation speed of the second rotary power source.

9. The control method of the power output system according to claim 8, wherein the buffer value is 10% of the maximum rotation speed of the first rotary power source.

10. The control method of the power output system according to claim 6, wherein the rotation speed to be output by the power output system is obtained by looking up a throttle opening-rotation speed table.