Control system for active power feedback energy saving device

A technology of digital control system and energy-saving device, applied in control system, motor generator control, electrical components, etc., can solve the problems of reducing system efficiency, wasting energy, high energy consumption, etc., to ensure safe operation, improve operation efficiency, The effect of improving electromagnetic compatibility performance

Inactive Publication Date: 2013-03-06
DALIAN HULIAN TIANXIA TECH DEV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It consumes a lot of energy, so it is a waste of energy and reduces the efficiency of the system

Method used

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  • Control system for active power feedback energy saving device
  • Control system for active power feedback energy saving device
  • Control system for active power feedback energy saving device

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Embodiment Construction

[0015] Active energy feedback type energy-saving products reversely transform the mechanical energy that the motor has transferred to the load into electrical energy for regeneration and utilization, so that the grid power consumed by the motor and load per unit time is reduced, thereby achieving the purpose of saving electricity. Such as figure 1 There are two main ways to save electric energy for the motor and its load shown in the diagram: one is to improve the operating efficiency of the motor load, such as fan and water pump speed regulation is an energy-saving measure aimed at improving the operating efficiency of the load, and another example is the frequency converter used for elevator drive Speed ​​regulation instead of traditional AC asynchronous motor voltage regulation and speed regulation is an energy-saving measure aimed at improving the operating efficiency of the motor. The second is to reversely convert the mechanical energy that the motor has transferred to t...

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Abstract

The invention discloses a control system for an active power feedback energy saving device. The control system is characterized by comprising a main circuit and a control circuit. The main circuit consists of an IPM (intelligent power module), an isolated diode, a filter circuit and a capacitor. The IPM is a core element of the main circuit and can invert direct-current power into three-phase current synchronous with an alternating-current power grid and then feed the three-phase current back to the power grid. The control circuit consists of a single-chip microcomputer, a programmable logic chip and a peripheral signal sampler, and further can automatically recognize phase sequence, phase position, voltage and current instantaneous value of the three-phase alternating-current power grid, sequentially control the IPM to work in a PWM (pulse width modulation) state and guarantee that the direct-current power can be fed back and recovered in time by the aid of high-redundancy software design. In addition, the control circuit is provided with indicating lights for indicating states of phase dislocation, overcurrent, energy feedback and the like, thereby bringing convenience for operators to observe working states of an active energy feedback unit. By the control system, running efficiency of an engine load is improved effectively, mechanical energy can be converted into electric power to be fed back and recovered, and electric power utilization efficiency is improved effectively.

Description

technical field [0001] The invention relates to a digital control system of an active electric energy feedback type energy-saving device. Background technique [0002] Take the elevator energy saving as an example: during the operation of the elevator, the heat generated by the resistance is very high, and the local temperature of the resistance is usually above 100°C. It is necessary to install an air conditioner or fan with a large exhaust air volume; in a machine room with a large elevator power, it is often necessary to use the air conditioner and fan at the same time, or to start multiple air conditioners and fans at the same time. In some places, the power consumption of cooling equipment is often higher than that of elevators; users know that the energy consumption is serious, but there is nothing they can do. Adopting elevator energy feedback and energy-saving technology, since there is no resistance heating source, the temperature of the elevator machine room drops...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02P3/18B66B1/14
Inventor 李宏飞
Owner DALIAN HULIAN TIANXIA TECH DEV
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