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Double speed motor soft starter and control method thereof

A technology of a two-speed motor and control method, which is applied to the starter, motor generator/starter, etc. of a single multi-phase induction motor, can solve complex problems and achieve the effect of soft stop

Inactive Publication Date: 2015-02-18
ANHUI XINLONG ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing soft starter is only designed for a motor whose parameters are determined. If it is necessary to use the existing soft starter to realize the function of controlling a two-speed motor, two soft starters are required and a complex secondary loop control design is required. Because the starting voltage, starting current, peak current protection, overvoltage and undervoltage, etc. of the starting process need to be set

Method used

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  • Double speed motor soft starter and control method thereof
  • Double speed motor soft starter and control method thereof
  • Double speed motor soft starter and control method thereof

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Embodiment Construction

[0018] Such as Figure 1-3 As shown, the input end of the soft starter of the two-speed motor soft start circuit is connected to the power supply, and the output end is connected to the motor. The line of the starter KM3 and the power supply line form a star connection, that is, when the contactor KM1 and KM3 are closed, it is a star connection, and at this time it is a low-speed mode; the soft starter and the motor pass through the line containing the contactor KM2 and the power supply line It constitutes a delta connection, that is, when KM1 and KM2 are closed, it is a delta connection, and at this time it is a high-speed mode; the control unit of the soft starter controls the binary input contacts K1 and K2 respectively to control the soft start of the high-speed and low-speed motors according to needs. Soft stop operation.

[0019] The soft starter does not need to connect the auxiliary contacts of the contactor in series and parallel with the start and stop buttons of th...

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Abstract

The invention discloses a double speed motor soft starting circuit. A power source is connected with a soft starter which is connected with a motor through a power supply circuit provided with a contactor KM1, the soft starter and the motor are in star connection through a circuit provided with a contactor KM3 and a power supply line, and the soft starter and the motor are in triangular connection through a circuit provided with a contactor KM2 and the power supply line. The double speed motor soft starting circuit comprises two start-stop command terminals which control a high-speed state and a low-speed state of the motor respectively, a complex secondary connection loop is not needed, complete program control is adopted, and safety and reliability are achieved; a program has two sets of different setting parameters which correspond to the high-speed state and the low-speed state of the motor respectively, start and stop of motors of different powers can be achieved, and a soft stop function of the motors can be achieved.

Description

technical field [0001] The invention relates to a soft starter for motor control equipment, in particular to a soft starter with two-speed motor control and a control method thereof. Background technique [0002] Soft starter is a kind of motor control equipment integrating soft start, soft stop, light load energy saving and multi-function protection. Realize the smooth start motor without impact during the whole start process, and adjust various parameters in the start process according to the characteristics of the motor load, such as current limit value, start time, etc. [0003] 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 a specific control algorithm to control the conduction angle of the three-phase parallel thyristor, so that the input voltage of the controlled motor changes according to different requirements, the function of smo...

Claims

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Application Information

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IPC IPC(8): H02P1/32
CPCH02P1/32
Inventor 束龙胜杨振李田徐怀斌徐成陶思磊
Owner ANHUI XINLONG ELECTRICAL
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