Drive system of linear motor and drive method of linear motor

A technology of linear motors and driving methods, applied in control systems, electric components, AC motor control, etc., can solve the problems of increasing output force by electromagnetic force and inappropriate positive and negative directions of electrical signals, etc., and achieve the effect of large output force

Inactive Publication Date: 2016-11-09
AAC TECH PTE LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Even under some special signals, when the motor reaches the maximum vibration amplitude, the amplitude of the electrical signal is not 0, but it is often caused by the inap

Method used

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  • Drive system of linear motor and drive method of linear motor
  • Drive system of linear motor and drive method of linear motor

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] see figure 1 , a linear motor drive system provided by the present invention includes a motor 10 with a vibrator, a detection module 20 for monitoring the current displacement of the vibrator, a signal input module 30 and a control module 40 .

[0020] The signal input module 30 is used for inputting the first driving signal for driving the vibrator to vibrate to generate displacement and the second driving signal for providing the vibrator with an electromagnetic force opposite to its current displacement direction.

[0021] The control module 40 controls the signal input module 30 to input the first drive signal to the motor 10, receives the current displacement of the vibrator sent by the detection module 20 and judges whether the current displacement is greater than or equal to the preset maximum displacement of the vibrator. When the curren...

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Abstract

The invention provides a drive method of a linear motor. The method comprises the steps of: (S1) providing a motor with a vibrator; (S2) inputting a first drive signal into the vibrator to drive the vibrator to vibrate to generate displacement; (S3) monitoring current displacement of the vibrator; (S4) judging whether the current displacement of the vibrator is greater than or equal to the preset maximum displacement of the vibrator or not; (S5) when the current displacement of the vibrator is greater than or equal to the preset maximum displacement of the vibrator, inputting a second drive signal with preset duration into the vibrator to provide the vibrator with electromagnetic force opposite to a current displacement direction; and (S6) providing the vibrator with a first drive signal to drive the vibrator to further vibrate.

Description

【Technical field】 [0001] The invention relates to the field of linear motors, in particular to a drive system and a drive method for a linear motor. 【Background technique】 [0002] When an electrical signal is used to drive a linear motor, the motor will start from rest until it reaches its maximum vibration amplitude. Since the velocity is 0 when the vibration amplitude is maximum, there is no damping force in the movement of the vibrator. The maximum force Foutput output by the motor is equal to the inertial force Finertial of the motor vibrator, |Foutput|=|Finertial|=|Fspring+Fem|, |Fspring|=|kD|, where k is the stiffness coefficient of the spring, and D is displacement. When D reaches the maximum value, Fspring is also the maximum value. On the one hand, the limitation of the maximum displacement amplitude of the motor comes from the spring. For a certain motor, its maximum amplitude is often limited, so the maximum restoring force of the spring is also limited. Obvi...

Claims

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Application Information

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IPC IPC(8): H02P25/06
CPCH02P25/06B06B1/04H02K11/215H02K11/30
Inventor 王洪兴王尧
Owner AAC TECH PTE LTD
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