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Controller for a power train

A power transmission system and controller technology, applied in the field of controllers

Inactive Publication Date: 2004-12-01
NIDEC SR DRIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these schemes are an improvement over the basic scheme of Figure 2, they are still subject to relatively large voltage swings on the bus when the engine reaches its braking power limit

Method used

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  • Controller for a power train
  • Controller for a power train
  • Controller for a power train

Examples

Experimental program
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Embodiment Construction

[0024] image 3 Shows a control schematic diagram of an embodiment of the present invention. The inner control loop of the prior art is still in its original position, so when the power transmission system enters braking, the PID controller 23 increases the work of the electric rotation of the motor 12 to keep the bus voltage at VS 1At or near. The engine, or its mechanical load, absorbs power, while its speed increases as needed to achieve power balance. The speed limiter 30 is connected to monitor the engine speed and the output provided to the controller 23 so that the generator 12 fixes its mechanical input power to the engine 10 below a safe limit. When the engine speed reaches the maximum safe operating speed, the limit function 30 prevents the controller 23 from requesting greater torque from the electric motor 12 acting as an electric motor, and activates the second PID controller 26' in the outer control loop. This second controller 26' responds to the output of both the...

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Abstract

A power train controller can operate in both motoring or braking modes. Its prime mover can accept a limited proportion of braking power and the remainder of the braking power is dissipated in an energy dump. The control system is arranged to maintain the voltage bus of the power train at a constant value throughout both modes.

Description

Technical field [0001] The present invention generally relates to a controller for a power train. More specifically, but not exclusively, the present invention relates to the reversible power flux in a control system with a motor and a prime mover that can absorb some power. Background technique [0002] Some independent power systems include prime movers, motors that function as generators, and electrical loads that simply absorb the generated electrical power. In these systems, the power flux is unidirectional and does not need to be reversed. The control of these systems is relatively straightforward. However, in other systems, the electrical load can often act as a temporary power source, and then the power flux in at least a part of the system is reversed. The control of these systems is more complicated. [0003] An example of a reversible power flux system is a hybrid electric vehicle. The power transmission system may include: a prime mover, such as an internal combustion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K6/26B60K6/46B60L7/08B60L7/20B60W10/06B60W10/08B60W20/00
CPCB60W20/00B60L2200/26Y02T10/6286Y02T10/6217B60L7/20B60L7/08B60L2220/18B60K6/46B60K6/26B60W10/06B60W10/08Y02T10/62
Inventor M·J·特纳P·A·赛克斯
Owner NIDEC SR DRIVES