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A composite auto-coupling step-down power-saving soft starter

A soft starter and autotransformer technology, applied in the direction of a single polyphase induction motor starter, motor generator/starter, etc., can solve the problem of lack of information transmission, reduced convenience of manual control and operation, inability to control information and Problems such as the transmission of motor working status information to achieve the effect of ensuring work safety and ensuring safe and efficient operation

Inactive Publication Date: 2016-03-30
田安振
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the soft starters widely used in the market cannot continue to regulate the input power to achieve a better power saving effect when the motor is working after starting; and most of the existing soft starters cannot realize the function of remote control operation. The convenience of manual control operation is greatly reduced; the existing soft starter does not have the function of information transmission, and cannot transmit control information and motor working status information to facilitate manual monitoring and control

Method used

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  • A composite auto-coupling step-down power-saving soft starter

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 As shown, the technical solution adopted by the present invention is a compound auto-coupling step-down power-saving soft starter, which includes a logic control unit and three start-up and power-saving units for processing three-phase alternating power supplies; each Each start-up and power-saving unit is provided with an autotransformer coil 1, and the incoming line tap 4 of each autotransformer 1 is connected in series with a composite protection circuit and a circuit breaker Ka, and each autotransformer 1 is respectively provided with an outgoing line tap 5, a middle Neutral zero tap 7 and start tap 6; each neutral zero tap 7 is connected in series with a neutral zero tap switch Kc connected to the logic control unit, and each start tap 6 is connected in series with a start tap connected with the logic control unit switch Kb; the soft starter is also equipped with a measurement statistics circuit for respectively measuring the current, voltage, frequen...

Embodiment 2

[0024] On the basis of Example 1, in order to realize step-down soft start and high efficiency and energy saving in motor operation, the present invention regulates the output power in real time. In a preferred embodiment, each autotransformer coil 1 is equipped with a coil located in the middle and lower part of the coil. 4 neutral zero-point taps 7, each autotransformer coil is provided with a starting tap 6 at the lower end, each autotransformer coil is provided with an outlet tap 5 at the upper part of the neutral zero-point tap 7, each autotransformer coil The top of the variac coil is provided with an incoming line tap 4, and all the neutral zero taps 7 and all the starting taps 6 of the three autotransformers 1 are connected to each other through lines; the three autotransformer coils are respectively wound on three On the iron core, other parts are identical to Embodiment 1.

Embodiment 3

[0026] On the basis of Embodiment 2, in order to realize the real-time monitoring of the working state of the motor to adjust the output power of the starter in real time, so as to achieve the purpose of protecting the motor and high efficiency and energy saving, a preferred embodiment also has the measurement and statistics circuit through The transformers 2 are respectively connected to the input main circuit of the three-phase alternating power supply, and an analog-to-digital conversion circuit for processing the collected main circuit current, voltage, frequency and phase signals is provided in the measurement and statistics circuit; each neutral zero point tap switch Both Kc and the start tap switch Kb are connected to the logic control unit through the control line 3. The neutral zero point tap switch Kc is a zero-crossing trigger type thyristor, and the start tap switch Kb is a random trigger type thyristor with adjustable conduction angle. Other parts and implementation...

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Abstract

The invention discloses a composite self-coupling buck energy-saving soft starter comprising a logic control unit and three start and energy-saving units. The start and energy-saving units are used for processing three-phase alternating power in an AC power supply. Each start and energy-saving unit is provided with a self-coupling transformer coil, and a composite protection circuit and a breaker are serially connected to an incoming tap of the self-coupling transformer coil. Each self-coupling transformer coil is provided with an outgoing tap, a neutral zero tap and a start tap. Each neutral zero tap and the corresponding start tap are serially connected with a switch which is connected with the logic control unit. The starter is further provided with a measurement and statistics circuit connected with the logic control unit, a tele-signaling and remote control unit, a man-machine interaction system and a communication unit. The composite self-coupling buck energy-saving soft starter allows for large-range buck soft start, also has the functions of high efficiency, energy saving, remote control and manual real-time monitoring, and has the advantages of high efficiency, energy saving, and safety.

Description

technical field [0001] The invention relates to a motor starting device, in particular to a composite self-coupling step-down power-saving soft starter. Background technique [0002] The soft starter is a motor control equipment that integrates soft start, soft stop, light load energy saving and multi-function protection. Adjust various parameters in the startup process, such as current limit value, startup time, etc. The soft starter is mainly composed of a three-phase parallel thyristor connected in series between the power supply and the controlled motor and its electronic control circuit. Using different methods to control the conduction angle of the three-phase parallel thyristor, so that the input voltage of the controlled motor can be changed according to different requirements, and different control start functions can be realized. [0003] When using a soft starter to start the motor, the output voltage of the thyristor gradually increases, and the motor gradually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P1/28
Inventor 田安振
Owner 田安振