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直流电机启动前你知道需要注意什么?

来源:http://www.jnmcd.com 发布时间:2019-01-11 浏览:
关于直流电机咱们大多数人都不会陌生,因此关于它,不仅在使用中有注意事项,还在发动之前有必定的注意事项,或许很多人都不了解,为此,小编就给我们讲解一下直流电机发动前的注意事项。
Most of us are familiar with DC motors, so we should pay attention not only in use, but also before starting. Perhaps many people do not understand it. For this reason, the editor will explain to us the precautions before starting DC motors.
1.直流电机的接线
1. Wiring of DC motor
发电厂一般采纳并激式直流电机,其电枢端子为H1和H2并激式绕组的端子为B1和B2,它的接线方式是H1并接B1后接直流电源的正极,H2并接B2后接直流电源的负极。
Parallel excitation DC motors are generally adopted in power plants. The armature terminals of H1 and H2 parallel excitation windings are B1 and B2. Its connection mode is that H1 is connected with the positive pole of B1 parallel DC power supply and H2 is connected with the negative pole of B2 parallel DC power supply.
2.下降直流电机的起动电流
2. Down the Starting Current of DC Motor
一般除了小于4KW的直流电机能够直接起动外,一切的直流电机的起动都应把起动电流降到电机的额定电流的2倍以下。要下降起动电流,一般要在电机起动时,在电枢回路内,串入起动电阻来限制起动电流或在电机起动时,下降电机的起动电压来限制起动电流。因为在电枢回路中串入起动电阻,使用设备简单,经济可靠,所以被普遍选用。
In general, except for direct starting of DC motors less than 4KW, the starting current of all DC Motors should be reduced to less than 2 times the rated current of the motor. In order to reduce the starting current, the starting resistance should be connected in series in the armature circuit to limit the starting current or to reduce the starting voltage of the motor to limit the starting current when the motor starts. Because the starting resistance is connected in series in the armature circuit, the use of equipment is simple, economical and reliable, so it is widely used.
山东微型电机
3.直流接触器的线圈问题
3. Coil Problem of DC Contactor
关于运转用直流接触器,其接触器线圈应是可长期运转的。而关于CZ0系列接触器来说,都是短时间运转的,因此当做长期运转接触器时,其线圈绝不能焚毁,所以,在起动完毕后,应给运转接触器串入一个约150W,1000Ω的电阻,防止线圈焚毁事端。
As for the DC contactor used in operation, its contactor coil should be able to operate for a long time. As for CZ0 series contactors, they all run for a short time, so when they are used as long-term contactors, their coils must not be burned. Therefore, after starting, a resistance of about 150 W, 1000 Omega should be added to the running contactors to prevent the coils from burning.
4.直流电流的丈量
4. Measurement of DC Current
关于直流电流的丈量,一般选用分流器式,在主回路串入100A,75mv的分流器,分流器的正负极接75mv的0∽100A电流表。
As for the measurement of DC current, shunt type is usually used. A 100A, 75mV shunt is connected in series in the main circuit. The positive and negative poles of the shunt are connected with a 0_100A ammeter of 75mv.
5.具有一级串电阻下降起动电流的直流电机起动接线原理接线图。
5. Principle wiring diagram of DC motor starting with one-stage series resistance descending starting current.
以上信息是我们山东微型电机整理发布希望对大家以后的生活带来一点帮助我们的网站是:http://www.jnmcd.com
The above information is our Shandong micro-motor collation and release hope to bring you a little help in the future life of our website is: http://www.jnmcd.com!
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