NBRA-669C--6438177017035  刹车斩波器  安装在变频器直流链端的电路

59012517

一般信息

产品编号:59012517

ABB型号:NBRA-669C

EAN: 6438177017035

目录描述:制动直升机NBRA-669C

详细说明:NBRA-669C，刹车斩波器

类别

产品»驱动器»驱动器选项»制动选项»NBRA -制动斩波器

NBRA-669C--6438177017035刹车斩波器（Braking Choppers）也被称为制动单元，是安装在变频器直流链端的电路。当负载将能量回灌到直流链时，刹车斩波器与刹车电阻一同工作，控制直流链的电压。例如，当一个已激磁的马达的负载为被动拖曳型负载时，马达的特性类似于发电机，将动能转换为电能并送至直流端。这种配合电阻，在制动时让电阻消耗能量的方法被称为电阻制动。

此外，NBRA-669C--6438177017035有些变频器内部也会内建刹车功率半导体（称为刹车晶体）及相关电路，此时只需保留连接刹车电阻的端子供客户安装即可。刹车斩波器动作的直流链电压准位由变频器自行设定。

请注意，NBRA-669C--6438177017035虽然刹车斩波器可以帮助控制直流链的电压，但它也可能增加火灾风险，特别是在存在灰尘和某些化学成分的环境中。同时，长时间的制动可能需要更精确的刹车斩波器尺寸选择。

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NBRA-669C--6438177017035  刹车斩波器  安装在变频器直流链端的电路

59012517

General information

Product Number :59012517

ABB model :NBRA-669C

EAN: 6438177017035

Catalog Description: Braking Helicopter NBRA-669C

Details :NBRA-669C, brake chopper

category

Products » Drive » Drive Options » Braking Options »NBRA - Brake Chopper

Braking Choppers, also known as braking units, are circuits installed at the DC end of the frequency converter. As the load feeds energy back into the DC chain, the brake chopper works with the brake resistor to control the voltage of the DC chain. For example, when the load of an excited motor is a passive drag type load, the motor behaves like a generator, converting kinetic energy into electrical energy and sending it to the DC end. This method of matching the resistor to allow the resistor to consume energy during braking is called resistance braking.

In addition, NBRA-669C-6438177017035 Some inverters will also have built-in brake power semiconductors (called brake crystals) and related circuits, at this time only need to reserve the terminal connected to the brake resistance for customer installation. The DC chain voltage level of brake chopper operation is set by the inverter itself.

Note that while the BRA-669C- 6438177017035 brake chopper can help control the voltage of the DC chain, it can also increase the risk of fire, especially in environments where dust and certain chemical components are present. At the same time, prolonged braking may require a more precise selection of brake chopper sizes.

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