Control system

A control system and control unit technology, which is applied in the control system, electrical program control, AC motor control, etc., can solve the problems of increasing the cost of the control system and the high price of isolation devices, and achieve the effect of safety for electrical operators and cost reduction

Active Publication Date: 2009-01-28
SHENZHEN H&T INTELLIGENT CONTROL
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

All isolation devices are very expensive, increasing the cost of the control system

Method used

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  • Control system

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Embodiment Construction

[0017] As shown in FIG. 1 , a control system includes a first control unit MCU1 , a second control unit MCU2 , an isolated power supply, and a non-isolated power supply. The isolated power supply is connected to the first control unit MCU1, and the first control unit controls the circuit that needs to be isolated. The non-isolated power supply is connected to the second control unit, and the second control unit controls the circuit that does not need to be isolated.

[0018] As shown in Figure 1, when communication between the first control unit and the second control unit is required, the control system may also include an optocoupler isolation device OPT, and the optocoupler isolation device OPT is connected between the first control unit and the second control unit. Between the two control units, it is used to realize the communication between the first control unit and the second control unit.

[0019] The isolated power supply includes a first filter unit, a transformer T...

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Abstract

The invention discloses a control system, which comprises a first control unit, a second control unit, an isolated power source and a non-isolated power source, wherein the isolated power source is connected with the first control unit which controls a circuit to be isolated; and the non-isolated power source is connected with the second control unit which controls a circuit not to be isolated. Through arranging the two control units, the control system is respectively powered by the isolated power source and the non-isolated power source, thereby saving a plurality of isolating devices and substantially reducing cost; moreover, the control system is safe and reliable, ensures higher safety of electric apparatus operating staff and protects the operating staff from getting an electric shock, thereby better meeting the requirements of safety criteria. The invention can also realize more functions at lower cost such as isolation of a human-machine switching unit, open circuit / short circuit protection for controlled silicon and overload protection.

Description

technical field [0001] The invention relates to a control system. Background technique [0002] Existing control systems generally use a single-chip microcomputer. For realizing the isolation drive of thyristor, the common practice is to use one isolated power supply, and then use isolation devices (such as optocouplers, etc.) Safety, but when the function of electrical appliances increases, if you want to achieve overload protection, thyristor open, short circuit protection, etc., you need to increase the overload protection circuit and open short circuit protection circuit. Power supply and a single-chip microcomputer solution, then each circuit related to the thyristor, such as the overload protection circuit and the open and short-circuit protection circuit, needs an isolation device to establish contact with the single-chip microcomputer and be controlled by it. All isolation devices are very expensive, increasing the cost of the control system. Contents of the inve...

Claims

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Application Information

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IPC IPC(8): G05B19/02H02P27/02H02M5/257H02H7/122
Inventor 姜西辉刘建伟首召兵
Owner SHENZHEN H&T INTELLIGENT CONTROL
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