阅读说明：本技术 一种开关磁阻发电机零位初始角的标定方法 (Calibration method for zero initial angle of switched reluctance generator ) 是由 宋超超 李雪阳 白保健 戴清云 于 2018-08-10 设计创作，主要内容包括：本发明涉及一种开关磁阻发电机零位初始角的标定方法，其特征在于：用万用表（5）测量在无外界电压作用下的开关磁阻发电机（1）的绕组电压值，并记录测量的电压值；用直流电压源（4）为开关磁阻发电机（1）施加DC24V电压，检查开关磁阻发电机（1）的转子是否固定；用万用表（5）测量开关磁阻发电机（1）的绕组电压、电流值，并记录测量的电压、电流值；转动位置传感器（6），重复测量开关磁阻发电机（1）的绕组电压、电流值，找到电流的峰值，此时的位置传感器位置就是开关磁阻电机（1）的初始角位置。本发明能得到开关磁阻发电机零位初始角的准确值，具有检测设备简单、廉价的优点，可实现工程化和自动化标定。(The invention relates to a method for calibrating a zero initial angle of a switched reluctance generator, which is characterized by comprising the following steps: measuring the winding voltage value of the switched reluctance generator (1) under the action of no external voltage by using a universal meter (5), and recording the measured voltage value; applying DC24V voltage to the switched reluctance generator (1) by using a direct-current voltage source (4), and checking whether the rotor of the switched reluctance generator (1) is fixed; measuring the winding voltage and current value of the switched reluctance generator (1) by using a universal meter (5), and recording the measured voltage and current value; and rotating the position sensor (6), repeatedly measuring the winding voltage and the current value of the switched reluctance generator (1), and finding out the peak value of the current, wherein the position of the position sensor at the moment is the initial angle position of the switched reluctance generator (1). The method can obtain the accurate value of the initial zero-position angle of the switched reluctance generator, has the advantages of simple detection equipment and low cost, and can realize engineering and automatic calibration.)

1. The calibration method of the zero initial angle of the switched reluctance generator comprises the switched reluctance generator (1), a direct current voltage source (4), a universal meter (5) and a position sensor (6), and is characterized in that: the switched reluctance generator (1) is fixed on the rack through fixing clamps (2) and (3), and the position sensor (6) is arranged at a position close to the switched reluctance generator (1) and is connected with the direct-current voltage source (4); measuring the winding voltage and current value of the switched reluctance generator (1) through a universal meter (5); measuring the winding voltage value of the switched reluctance generator (1) under the action of no external voltage by using a universal meter (5), and recording the measured voltage value; applying DC24V voltage to the switched reluctance generator (1) by using a direct-current voltage source (4), and checking whether the rotor of the switched reluctance generator (1) is fixed; measuring the winding voltage and current value of the switched reluctance generator (1) by using a universal meter (5), and recording the measured voltage and current value; and rotating the position sensor (6), repeatedly measuring the winding voltage and the current value of the switched reluctance generator (1), and finding out the peak value of the current, wherein the position of the position sensor at the moment is the initial angle position of the switched reluctance generator (1).

Technical Field

The invention belongs to the technical field of generators, and particularly relates to a method for calibrating a zero initial angle of a switched reluctance generator.

Background

The position information of the rotor of the switched reluctance generator directly influences the voltage build-up and electrical performance of the generator, a position sensor is generally required to be installed to obtain the accurate position of the rotor of the generator, the rotating speed of the generator is monitored, the zero position angle of the position sensor is deviated from the zero position angle of the switched reluctance generator, and the initial phase angle of an excitation source is matched with the initial phase angle of the excitation source by determining the initial position angle of the rotor. In addition, the switched reluctance generator and the position sensor may have an initial angle shifted during installation and removal, and thus a certain method is required to measure the angle. Disclosure of Invention

Aiming at the defects of the technology, the invention provides a method for calibrating the initial zero angle of a switched reluctance generator. The invention utilizes the current change of the change between different phases of the switched reluctance generator to find the peak value of the current, thereby obtaining the accurate value of the initial angle of the zero position of the generator. In order to solve the technical problems, the invention adopts the technical scheme that: a calibration method for zero initial angle of a switched reluctance generator comprises the switched reluctance generator, a direct current voltage source, a universal meter and a position sensor, and is characterized in that: the switched reluctance generator is fixed on the rack through a fixing clamp, and the position sensor is arranged at a position close to the switched reluctance generator and is connected with a direct-current voltage source; measuring the winding voltage and current value of the switched reluctance generator by a multimeter; measuring the winding voltage value of the switched reluctance generator under the action of no external voltage by using a universal meter, and recording the measured voltage value; applying DC24V voltage to the switched reluctance generator by using a direct-current voltage source, and checking whether a rotor of the switched reluctance generator is fixed; measuring the winding voltage and current value of the switched reluctance generator by using a multimeter, and recording the measured voltage and current value; and rotating the position sensor, repeatedly measuring the voltage and the current of the winding of the switched reluctance generator, and finding out the peak value of the current, wherein the position of the position sensor at the moment is the initial angular position of the switched reluctance motor. The position sensor adopts a Hall sensor, the Hall sensor is a magnetic effect sensor, does not need to be contacted, is arranged at a position close to the switched reluctance generator, and is converted into a switched reluctance generator rotation signal through a magnetic field signal.

The invention enables the rotor of the switched reluctance generator to be in a free static state; according to the voltage equation of the switched reluctance generator: u = iR + Ldi/dt + W_MmidL/d

It can be seen that idL/d is due to the rotor of the switched reluctance generator being at rest

=0, the voltage equation of a switched reluctance generator can be simplified to: u = Ldi/dt. Connecting a DC24V power supply to the switched reluctance generator to fix the rotor of the switched reluctance generator under the action of electromagnetic force; from u = Ldi/dt, the measurable current peak value of the winding of the switched reluctance generator is i under the action of certain external voltage_peak=UT/L(

). Wherein, L (theta) is the inductance of the winding at the detected initial position; u is a square wave test voltage amplitude; t is the duration of the square wave voltage. At U, T, the peak current is inversely related to the inductance at the location being sensed. Different rotor positions correspond to different peak currents, and a unique rotor position angle can be obtained by detecting the peak currents, so that zero initial angle position detection is realized.

The invention obtains the accurate value of the initial zero-position angle of the switched reluctance generator by utilizing the current peak value relation of the switched reluctance generator winding, has the advantages of simple detection equipment and low cost, and can realize engineering. In addition, the method is simple to operate and can realize automatic calibration.

Drawings

Fig. 1 is a schematic view of the connection structure of the present invention.

In the figure, 1, a switched reluctance generator, 2, a right fixing card, 3, a left fixing card, 4, a direct-current voltage source, 5, a universal meter, 6 and a position sensor.

Detailed Description

The invention is described in further detail below with reference to the drawings.

A calibration method for zero initial angle of a switched reluctance generator comprises a switched reluctance generator 1, a direct current voltage source 4, a universal meter 5 and a position sensor 6, and is characterized in that: the switched reluctance generator 1 is fixed on a rack through fixing clamps 2 and 3, and a position sensor 6 is arranged at a position close to the switched reluctance generator 1 and connected with a direct current voltage source 4; measuring the winding voltage and current value of the switched reluctance generator 1 through a multimeter 5; measuring the winding voltage value of the switched reluctance generator 1 under the action of no external voltage by using a universal meter 5, and recording the measured voltage value; applying DC24V voltage to the switched reluctance generator 1 by using the direct-current voltage source 4, and checking whether the rotor of the switched reluctance generator 1 is fixed; measuring the winding voltage and current value of the switched reluctance generator 1 by using a universal meter 5, and recording the measured voltage and current value; and rotating the position sensor 6, repeatedly measuring the winding voltage and the current value of the switched reluctance generator 1, and finding out the peak value of the current, wherein the position sensor at the moment is the initial angular position of the switched reluctance motor 1. The position sensor 6 adopts a Hall sensor which is a magnetic effect sensor, does not need to be contacted, is arranged at a position close to the switched reluctance generator, and converts a magnetic field signal into a rotating signal of the switched reluctance generator.

The invention makes the rotor of the switch reluctance generator in free static state; according to the voltage equation of the switched reluctance generator: u = iR + Ldi/dt + W_MmidL/d

It can be seen that idL/d is due to the rotor of the switched reluctance generator being at rest

=0, the voltage equation of a switched reluctance generator can be simplified to: u = Ldi/dt. Connecting a DC24V power supply to the switched reluctance generator to fix the rotor of the switched reluctance generator under the action of electromagnetic force; from u = Ldi/dt, the voltage can be controlled at a certain external voltageWith the adoption of the method, the measurable current peak value of the winding of the switched reluctance generator is i_peak=UT/L(

). Wherein, L (theta) is the inductance of the winding at the detected initial position; u is a square wave test voltage amplitude; t is the duration of the square wave voltage. At U, T, the peak current is inversely related to the inductance at the location being sensed. Different rotor positions correspond to different peak currents, and a unique rotor position angle can be obtained by detecting the peak currents, so that zero initial angle position detection is realized.