news center

新闻中心

新闻中心
公司资讯 行业资讯
  • 霍尔开关在机械电机上的应用领域
  • 本站编辑:杭州欧邦电子科技有限公司发布日期:2019-08-06 17:08 浏览次数:

 霍尔开关在电机中的作用:在一定的位置改变电流方向-让线圈产生相反的磁极!简单一点的说就是换项用!利用的是定子(磁场不变)和转子{线圈电流不同(当线圈到达一定位置霍尔给出信号改变电流方向)产生磁场方向不同}所产生的磁场同性相吸异性相斥来产生动力。霍尔开关在电机中一般起到检测电机转速的作用

  1,霍尔开关在逆变器中的应用

  在逆变器中,用霍尔电流传感器进行接地故障检测、直接侧和交流侧的模拟量传感,以保证逆变器能安全工作。

  2,霍尔开关在接地故障检测中的应用

  在配电和各种用电设备中,可靠的接地是保证配电和用电设备安全的重要措施。采用霍尔元件电流传感器来进行接地故障的自动监测,可保证用电安全。

  3,霍尔开关在电子点焊机中的应用

  在电子点焊机电源中,霍尔电流传感器起测量和控制作用。它的快速响应能再现电流、电压波形,将它们反馈到可控整流器A、B,可控制其输出。用斩波器给直流迭加上一个交流,可更精确地控制电流。用霍尔元件电流传感器进行电流检测,既可测量电流的真正瞬时值,,又不致引入损耗。

  4,霍尔开关在不间断电源中的应用

  霍尔电流传感器1发出信号并进行反馈,以控制晶闸管的触发角,电流传感器2发出的信号控制逆变器,传感器3控制浮充电源。用霍尔电流传感器进行控制,保证逆变电源正常工作。由于其响应速度快,特别适用于计算机中的不间断电源。

  5,霍尔开关在交流变频调速电机中的应用

  用变频器来对交流电机实施调速,在世界各发达国家已普遍使用,且有取代直流调速的趋势。用变频器控制电机实现调速,可节省10%以上的电能。在变频器中,霍尔元件电流传感器的主要作用是保护昂贵的大功率晶体管。由于霍尔电流传感器的响应时间短于1μs,因此,出现过载短路时,在晶全管未达到极限温度之前即可切断电源,使晶体管得到可靠的保护。

  6,霍尔开关在电网无功功率自动补偿中的应用

  电力系统无功功率的自动补偿,是指补偿容量随负荷和电压波动而变化,及时准确地投入和切除电容器,避免补偿过程中出现过补偿和欠补偿的不合理和不经济,使电网的功率因数始终保持最佳。无功功率的自动采样若用霍尔电流、电压传感器来进行,在保证“及时、准确”上具有显著的优点。因为它们的响应速度快,且无相位差。

  7,霍尔开关用于电车斩波器的控制

  电车中的调速是由调整电压实现的。将霍尔电流传感器和其它元件配合使用,并将传感器的所有信号输入控制系统,可确保电车正常工作。

Hall switch in the motor role: in a certain position to change the direction of the current - so that the coil produces the opposite pole! A simpler way to say it is to switch terms! The use of stator (magnetic field is unchanged) and rotor {coil current is different (when the coil reaches a certain position hall gives the signal to change the direction of the current) the direction of the magnetic field is different} generated by magnetic field like attraction opposite to repel to generate power. Hall switch plays a role in detecting motor speed

1. Application of hall switch in inverter

In the inverter, hall current sensor is used for ground fault detection and analog sensing of direct side and ac side to ensure the safe operation of the inverter.

2. Application of hall switch in ground fault detection

In distribution and various electrical equipment, reliable grounding is an important measure to ensure the safety of distribution and electrical equipment. Hall element current sensor is used to automatically monitor the grounding fault, which can ensure the safety of electricity.

3. Application of hall switch in electronic spot welding machine

Hall current sensor is used to measure and control electronic spot welder power supply. Its rapid response can reproduce current and voltage waveforms and feed them back to controllable rectifier A and B, which can control their output. The current can be more accurately controlled by adding an ac to the dc stack with a chopper. The real instantaneous value of current can be measured by using hall element current sensor, and no loss can be introduced.

4. Application of hall switch in uninterruptible power supply

Hall current sensor 1 sends a signal and gives feedback to control the trigger Angle of thyristor, the signal sent by current sensor 2 controls the inverter, and the floating charging source is controlled by sensor 3. Hall current sensor is used to control the inverter. Because of its fast response time, it is especially suitable for uninterruptible power supply in computer.

Hall switch in ac frequency conversion motor application

It has been widely used in developed countries in the world to use frequency converter to implement speed regulation of ac motor, and it has the tendency to replace dc speed regulation. Using frequency converter to control the motor to realize speed regulation, can save more than 10% of electric energy. In frequency converters, the main function of hall element current sensor is to protect expensive high power transistors. Since the response time of the hall current sensor is less than 1 micron, an overload short circuit can cut off the power supply before the crystal tube reaches its limit temperature, thus providing reliable protection for the transistor.

6. Application of hall switch in automatic reactive power compensation of power grid

Automatic compensation of reactive power in power system refers to the compensation capacity changing with load and voltage fluctuation, timely and accurate input and removal of capacitors, to avoid unreasonable and uneconomic over-compensation and under-compensation in the compensation process, so as to maintain the best power factor of the power grid. If hall current and voltage sensor are used for automatic sampling of reactive power, it has significant advantages in ensuring "timely and accurate". Because they respond quickly and there is no phase difference.

7. Hall switch is used for the control of tram chopper

The speed adjustment in the trolley is realized by adjusting the voltage. The hall current sensor and other components are used together, and all signals from the sensor are input into the control system to ensure the normal operation of the trolley.