CN211321249U - Closed-loop motor power saving device - Google Patents

Abstract

The utility model provides a closed-loop motor power saving device, including electron pressure regulating module, control module, current transformer S, electron pressure regulating module passes through control end K1, K2 and is connected with control module, and electron pressure regulating module output Ua, Ub, Uc are connected to control module through voltage sampling circuit and current transformer S through current sampling circuit S1, S2, form closed-loop control circuit. The utility model discloses when the motor takes various change loads, according to electron voltage regulation module output real time monitoring output voltage electric current size, utilize dynamic closed loop control self-adaptation to trail the effective output of adjustment motor, reduce the loss of motor no-load or underloading operation in-process by a wide margin, improve motor operating efficiency to reach energy-conserving purpose. The device has the advantages of reliable operation, convenient installation, low cost and easy wide energy-saving application to the existing motor.

Description

Closed-loop motor power saving device

Technical Field

The utility model relates to an electrical equipment field especially relates to a closed-loop control motor economizer.

Background

The asynchronous motor has the advantages of simple structure, low price, firmness, durability, little maintenance requirement and the like, is widely applied to various fields of industrial and agricultural production, and accounts for more than 50 percent of the total power consumption according to statistics. Near the rated load, the efficiency of the motor is the highest, usually above 80%, but many production machines are operated with varying loads, such as punching machines, machine tools, fans, injection molding machines, conveyors, crushers, etc. When the motor load is reduced, the efficiency of the motor is obviously reduced, and when the motor is in no load or light load, the efficiency of the motor is very low, so that not only is the power energy seriously wasted, but also the power supply quality of a power grid is influenced.

The existing motor can improve the energy efficiency by purchasing a high-efficiency motor, but the motor is expensive and needs to continuously run under the condition of approaching the rated load to realize high efficiency, but still has higher energy consumption when in no-load or light-load; some of the existing various motor power savers in the market can not dynamically track and save power, some of the existing various motor power savers are very high in price, and some of the existing various motor power savers can only compensate for reactive power.

Disclosure of Invention

In order to solve the problem that exists among the above-mentioned technique, the utility model provides a motor adopts closed-loop control dynamic tracking load to change when taking various change loads, and the economize on electricity mode that real-time closed-loop adjustment motor effectively exported the realization easily carries out wide application's power saving device to current motor.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a closed-loop motor power saving device comprises an electronic voltage regulating module, a control module and a current transformer S, wherein the electronic voltage regulating module is connected with the control module through control ends K1 and K2, and output ends Ua, Ub and Uc of the electronic voltage regulating module are connected to the control module through voltage sampling circuits and the current transformer S through current sampling circuits S1 and S2 to form a closed-loop control loop; wherein the content of the first and second substances,

the control module comprises a power supply module, a phase sequence detection module, a voltage detection module, a current detection module, an A/D processing module, a DSP operation module, a trigger module, a communication module, a parameter setting module and a display screen, wherein the DSP operation module is respectively connected with the power supply module, the phase sequence detection module, the A/D processing module, the trigger module, the communication module, the parameter setting module and the display screen;

the electronic voltage regulating module mainly comprises an anti-parallel thyristor module and a thyristor driving circuit, or comprises an IGBT module and an IGBT driving circuit.

The control module calculates the proportion of copper loss and iron loss of the motor M according to the collected output voltage and output current of the electronic voltage regulating module and an algorithm through the DSP operation module, and then compares the proportion with the optimal efficiency curve of the motor, and the control module controls the electronic voltage regulating module to increase or decrease the output voltage and current according to the comparison result, so that the motor M is in the highest output efficiency under various working states through circulating dynamic closed-loop control, and the power-saving effect is achieved.

The utility model has the advantages as follows:

the utility model discloses when the motor takes various change loads, according to electron voltage regulation module end real time monitoring output voltage electric current size, utilize dynamic closed loop control self-adaptation to trail the effective output of adjustment motor, reduce the loss of motor no-load or underload operation in-process by a wide margin, improve motor operating efficiency to reach energy-conserving purpose. The device has the advantages of reliable operation, convenient installation, low cost and easy wide energy-saving application to the existing motor.

Drawings

Fig. 1 is a block diagram of a closed-loop motor power saving device according to the present invention.

Fig. 2 is a block diagram of a structure of a control module in fig. 1.

Detailed Description

The present invention is further described in detail with reference to the drawings and the embodiments, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

As shown in fig. 1, the utility model comprises an electronic voltage regulating module, a control module and a current transformer S, wherein the electronic voltage regulating module is connected with the control module through control terminals K1 and K2, and the output ends Ua, Ub and Uc of the electronic voltage regulating module and the current sampling loops S1 and S2 of the current transformer S are connected to the control module to form a closed-loop control loop; the electronic voltage regulating module is externally connected with an alternating current power supply, and the output ends Ua, Ub and Uc of the electronic voltage regulating module are connected with a motor M.

As shown in fig. 2, the control module includes a power module, a phase sequence detection module, a voltage detection module, a current detection module, an ad processing module, a DSP operation module, a trigger module, a communication module, a parameter setting and a display screen, the DSP operation module is connected to the power module, the phase sequence detection module, the ad processing module, the trigger module, the communication module, the parameter setting and the display screen, the electronic voltage regulation module output Ua, Ub and Uc are connected to the voltage detection module, the current transformer S is connected to the current detection module, the voltage detection module and the current detection module are connected to the ad processing module, and the power module and the phase sequence detection module are connected to the ac power supply respectively. The power module provides a voltage source for the control module, and the communication module can transmit various running parameters and states of the motor M to the upper computer through a 485 interface or GPRS.

The electronic voltage regulating module mainly comprises an anti-parallel thyristor module and a thyristor driving circuit, or comprises an IGBT module and an IGBT driving circuit.

The working principle of the utility model is as follows: when the motor M is started, the phase sequence detection module judges whether the phase sequence of the three-phase alternating current power supply is normal or not, and outputs a signal to the DSP operation module to judge whether to give an alarm or not; when the motor M runs with load, full-wave rectification is carried out on input voltage and input current of the motor through the voltage detection module and the current detection module, the input voltage and the input current are transmitted to the A/D processing module for conversion, the proportion of copper loss and iron loss of the motor M is calculated through the DSP operation module according to an algorithm, then the comparison is carried out with the optimal efficiency curve of the motor, the DSP operation module sends pulse control signals to the electronic voltage regulation module through the triggering module through ports K1 and K2 according to the comparison result, the electronic voltage regulation module improves or reduces output voltage and current through controlling a thyristor or an IGBT, and the dynamic closed-loop control is circulated, so that the motor M is at the highest output efficiency under various working states, and the power saving effect is achieved.

To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (1)

1. A closed-loop motor power saving device is characterized in that: the intelligent control system comprises an electronic voltage regulating module, a control module and a current transformer S, wherein the electronic voltage regulating module is connected with the control module through control ends K1 and K2, and output ends Ua, Ub and Uc of the electronic voltage regulating module are connected to the control module through voltage sampling circuits and the current transformer S through current sampling circuits S1 and S2 to form a closed-loop control loop; the control module comprises a power supply module, a phase sequence detection module, a voltage detection module, a current detection module, an A/D processing module, a DSP operation module, a trigger module, a communication module, a parameter setting module and a display screen, wherein the DSP operation module is respectively connected with the power supply module, the phase sequence detection module, the A/D processing module, the trigger module, the communication module, the parameter setting module and the display screen; the electronic voltage regulating module mainly comprises an anti-parallel thyristor module and a thyristor driving circuit, or comprises an IGBT module and an IGBT driving circuit.

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