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Inverter and its output voltage control method, vacuum system control method

A technology of output voltage and control method, which is applied in the field of control of frequency converter and its output voltage, control of vacuum system, and can solve problems such as the loss of motor control of frequency converter

Active Publication Date: 2022-06-17
安川电机(中国)有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the power supply voltage may exceed the input voltage of the inverter, and the inverter will lose control of the motor

Method used

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  • Inverter and its output voltage control method, vacuum system control method
  • Inverter and its output voltage control method, vacuum system control method
  • Inverter and its output voltage control method, vacuum system control method

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Embodiment Construction

[0039] In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0040] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening another element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or it may b...

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Abstract

The application discloses a frequency converter, a control method for its output voltage, and a control method for a vacuum system. Wherein, the method for controlling the output voltage of the frequency converter includes the following steps: when the q-axis current increases above the first predetermined value, gradually increase the first target speed of the frequency converter to the second target speed; wherein, the The first target speed corresponds to a first load; the second target speed corresponds to a second load greater than the first load; when the output voltage exceeds a voltage setting threshold, a d-axis current is applied; the d-axis current and the The q-axis current cooperates to reduce the output voltage below the input voltage of the frequency converter; wherein, the voltage setting threshold is below the input voltage of the frequency converter. The inverter, its output voltage control method, and the vacuum system control method provided by the present application can preferably prevent the inverter from losing control of the working unit including the motor.

Description

technical field [0001] The invention relates to the technical field of frequency converter control, in particular to a frequency converter and a control method for its output voltage, and a control method for a vacuum system. Background technique [0002] The descriptions in this section merely provide background information related to the present disclosure and do not constitute prior art. [0003] The frequency converter is a common device for controlling the operation of the motor. It can adjust the output voltage and frequency through a series of operations such as rectification, filtering, and inversion to adapt to the voltage demand of the motor due to load changes. [0004] The output voltage of the inverter is the power supply voltage of the motor. In order for the inverter to control the motor, the power supply voltage cannot exceed the input voltage of the inverter. However, a change in load causes the supply voltage to the motor to change accordingly. For examp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/24
CPCH02P21/24
Inventor 久保田智夫繁冈克也
Owner 安川电机(中国)有限公司
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