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Starter and its method

A technology of starting device and inductive circuit, which is applied in the deceleration device of AC motor, starter of single DC motor, motor generator/starter, etc., can solve the problems of high cost, noise, complicated design, etc.

Inactive Publication Date: 2007-02-14
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to high cost and complex design, this multi-stage or segmented start-up method will still cause a lot of noise during start-up, and will also affect the reliability of internal electronic components under multiple impacts

Method used

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Embodiment Construction

[0015] The invention provides a starting device applied to an inductive circuit, such as a DC motor, which can reduce the instantaneous current generated when the motor is started. refer to figure 1 , which shows a preferred embodiment of the starting device of the present invention, the starting device includes a signal generator 12, electrically connected to the motor 11, which generates a square wave signal in response to the rotational speed of the motor; a comparator circuit, electrically connected to the signal The generator 12 is used to convert the square wave signal into a triangular wave or sawtooth wave signal, and compares the second signal with a reference signal to generate a control signal; and a control element 16 is electrically connected to the comparison circuit and the motor 12. It is used to receive the control signal, and gradually increase the current input to the motor in response to the control signal, thereby reducing the instantaneous current generat...

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Abstract

A starting device and its method can be used in inductive circuit such as motor to decrease instantaneous current produced when inductive circuit being started. The starting device includes a signal generator, a comparator and a control element. The generator is electrically connected to the said inductive circuit and generates first signal caused by responding the outputted signal of the inductive circuit. The comparator is electrically connected to the signal generator, and it is used to converter the first signal to the second signal and compare the second signal with a reference signal so as to produce a control signal. The control element is electrically connected to the comparator and the inductive circuit. In responding the control signal, the control element gradually increases the current that is input into the inductive circuit so as to decrease the instantaneous current produced when inductive circuit being started.

Description

technical field [0001] The invention relates to a starting device and method, in particular to a starting device and method applied to an inductive circuit, such as a DC motor, which can reduce the instantaneous current generated when the inductive circuit is started. Background technique [0002] A general motor has mechanical contacts such as brushes and commutators in its structure, so the motor will generate a huge instantaneous current when it is started. This is due to improper arrangement of circuit wiring and poor performance of the power supply itself. In the past, because there is no buffer circuit in the design to prevent this instantaneous current, this current often causes damage to the internal motor or the use system. [0003] Some of the current solutions to this problem are to add protective circuits such as capacitors or rheostats to the motor power supply, or to start with multi-stage or segmented start-up through expensive and complicated circuits to redu...

Claims

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Application Information

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IPC IPC(8): H02P1/18
Inventor 游守德
Owner DELTA ELECTRONICS INC
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