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News

Dynamic brake chopper handles retrofit to any power rating and duty cycle

CP Automation : 03 September, 2013  (New Product)
Following Pikatron's 2011 acquisition of TAE Antriebstechnik GmbH, CP Automation now stocks the company’s complete range of Brake Chopper Units (BCU). TAE Pikatron BCU’s provide an ideal retrofit solution for variable speed drives (VSDs) and inverters in a market where VSD manufacturers are increasingly reluctant to offer and stock add-ins to their core products.
Dynamic brake chopper handles retrofit to any power rating and duty cycle
A key benefit of TAE Pikatron BCU’s is that they are rated at 100% duty of the VSD, which not all brake choppers are. Some cheaper units only provide duty as low as 30%. CP Automation holds in stock up to 100kW continuously rated or 360kW peak. 
 
Using the TAE BCU’s, multiple drives on a system can all be connected to one brake chopper and resistor combination. Another benefit is that TAE Pikatron BCU’s are compact "fit-and-forget" units with nothing to set up and configure. “The TAE products don’t need multiple units configured in a master/slave design, using up valuable panel space. However, the units do have the option to be configured in master/slave mode for applications larger than 100Kw continuous,” explains CP Automation business development specialist John Mitchell.
 
CP Automation’s engineers help ensure each design is the most effective for the end-user application. No separate control voltage is necessary for the control board and emergency stop is possible even after a power failure because control is powered by the DC bus.
 
Variants of the TAE product include Fault output modules and options for 230VAC VSD’s and motion control systems, with a future range due to be released shortly for 600V AC VSDs. 
 
The unit currently available can be used worldwide, with input bus voltage from 200-440V DC or 450-800V DC. It can also be set in the factory to switch at a pre-specified custom required voltage.
 
An external dynamic brake chopper can be connected to the positive and negative terminals of the DC bus of a variable speed drive (VSD), protected by ultra-fast fuses. The resistor terminals on the chopper are in turn connected to the brake resistor terminals. 
 
The compact unit has operating, fault and standby indication using LEDs and exploits state-of-the-art insulated-gate bipolar transistors (IGBTs). Featuring easy start up with no adjustment necessary, the rugged metal case provides the high levels of electromagnetic compatibility (EMC) performance and is earth and short circuit protected. When the chopper is active, minimal voltage ripple appears on the DC bus.
 
Brake choppers for a 230VAC Inverter with 200 to 440V DC bus come in nine models, which will handle continuous power from 5.5k to 41kW, peak power from 16 to 185kW, continuous current from 15 to 110A, and peak current from 45 to 500A. 
 
Brake choppers for a 380-460V AC inverter with 450-800V DC bus also come in nine models to handle continuous power from 11kW to 100kW, peak power from 33 to 360kW, continuous current from 15 to 110A, and peak current from 45 to 500A.
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