MDB Series Brake Unit

The MDB brake unit series uses advanced power control technology to develop high-performance brake products in combination with a new generation of IGBT power devices.

The power brake unit can release the electric energy generated by the motor during the braking process through the power resistor (brake resistor) to generate sufficient braking torque to ensure the normal operation of the inverter and other equipment.

Features
Specifications
Selection table
Classic Case
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Features of MDB Series Electric Braking Unit for Interter

The MDC series brake unit is used in the inverter to transfer the regenerative energy generated by the motor to the brake resistor for release. When a motor brakes, the regenerative energy generated during the braking phase will be fed back to the higher-level inverter device, which will cause the DC bus voltage of the device to rise, affecting the safety and normal operation of the device. The braking unit for inverter will greatly consume this energy to protect the inverter.
The MDC braking unit for inverter is connected in parallel to the DC bus of the inverter. The bus voltage is limited to an acceptable level and the brake regenerative energy is transferred to the external braking resistor.
The braking resistor releases the brake energy in the form of thermal energy.
The brake unit for motor is connected directly to the frequency converter or inverter via the DC link terminals. When the DC bus voltage reaches a predetermined limit, the brake unit is automatically turned on to prevent the DC bus voltage from continuing to increase. The operation of the brake unit is independent of the frequency converter or inverter.
The brake power brake unit electronics are powered by the DC bus voltage.
In order to increase the braking power, the braking unit for VFD can be connected in parallel.
The MDC dynamic braking unit is available in 100A and 200A specifications. The product voltage rating covers both 220V and 380V voltage levels.

Technical Specifications of MDB Series Brake Control Unit

Rated Output	Maximum discharge current	100A（10%ED,10s；MDB-100-4）；200A（10%ED,10s；MDB-200-4）
	Rated discharge current	30A (continuous; MDB-100-4); 60A (continuous; MDB-200-4)
	Brake starting voltage	380~460VDC (5 files optional)
	Hysteresis voltage	About 16V
Power Supply	DC supply voltage	460~800VDC
Protection Features	Radiator overheat protection	Protected by thermistor
Protection Features	Display during charging	The main circuit DC voltage reaches about 50V. The charging indicator (CHARGE) lights up
Environment	Ambient temperature	-10℃～40℃, derated 4% when the temperature rise by every 1℃(40℃～50℃)
	Humidity	90%RH or less (non-condensing)
	Altitude	≤1000M: output rated power, ＞1000M: output derated
	Storage temperature	-20℃～60℃
	Storage environment	Indoor, no direct sunlight, dust, corrosive gases, flammable gases, oil mist, steam, dripping, salt, vibration
	IP protection level	IP20

Selection Table of MDB Series Brake Unit

MDB Series Brake Unit model selection.jpg

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