Method for the open-loop and closed-loop control of an internal combustion engine with a generator and asynchronous machine, open-loop and closed-loop control unit, and internal combustion engine

An open-loop control and closed-loop control technology, which is applied in the control of generators, internal combustion piston engines, electrical control, etc., can solve the problem of high power, achieve the effect of improving load switching ability and avoiding speed fluctuation

Active Publication Date: 2020-08-18
ROLLS ROYCE SOLUTIONS GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high inrush current causes short-term overpowering

Method used

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  • Method for the open-loop and closed-loop control of an internal combustion engine with a generator and asynchronous machine, open-loop and closed-loop control unit, and internal combustion engine
  • Method for the open-loop and closed-loop control of an internal combustion engine with a generator and asynchronous machine, open-loop and closed-loop control unit, and internal combustion engine
  • Method for the open-loop and closed-loop control of an internal combustion engine with a generator and asynchronous machine, open-loop and closed-loop control unit, and internal combustion engine

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Embodiment Construction

[0029] exist figure 1 The curve of the starting current of an asynchronous machine with respect to time is shown by way of example in . Here, the inrush current I first rises sharply up to the maximum inrush current I max and then descend to operating level I B Above, the asynchronous machine works at the stated operating level after the start-up phase. The sharp rise of the current curve at the beginning of the starting phase is expressed by the gradient di / dt, that is to say the change of the characteristic variable over a certain time interval. According to the invention, the increase is detected as an electrical characteristic variable change, and as soon as the characteristic variable change is above a first limit value, a changeover from standard speed regulation of the internal combustion engine connected to the asynchronous machine to feedforward control is carried out. In this case, the setpoint injection quantity for the internal combustion engine is determined wi...

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Abstract

The invention relates to a method for the open-loop and closed-loop control of an internal combustion engine (BK), in particular a diesel engine or gas engine, with a generator (G) and asynchronous machine (ASM), comprising the following steps: detecting at least one electrical characteristic variable of the generator, wherein the electrical characteristic variable is selected from current (I), voltage (U) or frequency (f); determining a characteristic variable change in the electrical characteristic variable of the generator in a predetermined time interval; comparing the change in characteristic variable with a first threshold value; and in the event that the change in characteristic variable is greater than the first threshold value, changing from a standard speed control of the internal combustion engine to a feed-forward control.

Description

technical field [0001] The invention relates to a method for open-loop and closed-loop control of an internal combustion engine with generator and asynchronous machine, an open-loop control and closed-loop control mechanism for an internal combustion engine with generator and asynchronous machine, and an internal combustion engine with generator and asynchronous machine. Background technique [0002] In projects and in the operation of internal combustion engines with generators, such as internal combustion motors, asynchronous machines are often used as load motors for various applications, for example as drives for fans, pumps and cranes. An asynchronous motor is one of the most frequently manufactured electric machines, since it can be produced simply and cost-effectively. Due to the construction, high starting currents of up to eight times the rated current occur when the asynchronous machine is switched on. The high starting currents result in short-term overpowering. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/06F02D41/14F02D41/04H02P9/04
CPCF02D29/06H02P9/04F02D2041/141F02D2041/1412F02D41/021F02D31/007F02D41/1401F02D2041/1409F02D2250/18
Inventor S.黑克尔H.魏斯
Owner ROLLS ROYCE SOLUTIONS GMBH
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