DS2020ACHAG1 - AC2000 Regenerative Chopper Circuit Module

SPECIFICATIONS:

Part Number: DS2020ACHAG1
Manufacturer: General Electric
Product Type: AC2000 Regenerative Chopper Circuit Module
Function: Power Supply Board
Series: AC2000
Output Voltage: 24 V DC
Output Current: 65 A
Maximum Output Power: 2.1 kW
Input Current (Nominal Load): 8 A AC
Overvoltage Protection: 32 V DC
Input Voltage: 230 V AC
Size: 26.41 cm High x 21.33 cm
Availability: In Stock
Repair: 3 to 7 Working Days
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS2020ACHAG1 is an AC2000 Regenerative Chopper Circuit Module designed and manufactured by General Electric as a part of the AC2000 series used in the Drive Control Systems. A chopper converts a fixed DC voltage into a variable DC voltage. It utilizes self-commutated devices such as MOSFETs, IGBTs, power transistors, GTOs, and IGCTs. These devices can be switched on and off using low-power gate signals without requiring additional commutation circuits. Operating at high frequencies, the chopper enhances motor performance by reducing ripple and eliminating discontinuous conduction. One of its key advantages is enabling regenerative braking even at low generating speeds, especially when the drive is supplied from a fixed to a lower DC voltage.

MONITORING CONTROL:

• The transistor chopper-controlled, separately excited DC motor is illustrated in the figure below. The transistor (Tr) operates periodically with a total period T and remains on for a duration Ton. The corresponding waveforms for motor terminal voltage and armature current are also shown.

• When Tr is on, the motor terminal voltage is V, and the armature current increases from ia1 to ia2. This phase is called the duty interval, as the motor is directly connected to the supply. At time t = Ton, Tr is turned off, and the motor current flows through the freewheeling diode Df, with the terminal voltage dropping to zero.

• This second phase, where Ton ≤ t ≤ T, is known as the freewheeling interval, during which the armature current decreases from ia2 back to ia1. The duty cycle is defined as the ratio of the on-time Ton to the total chopper period T.

REGENERATIVE BRAKING:

• The chopper configuration for regenerative braking is shown in the figure below. The transistor Tr operates periodically with a total period T and an on-time of Ton. The waveforms for motor terminal voltage va and armature current ia under continuous conduction are also illustrated.

• An external inductance is added to increase the overall inductance La of the armature circuit. During the on-state of the transistor, the current i rises from i1 to i2. In this mode, the motor functions as a generator, converting mechanical energy into electrical energy. Part of this energy increases the magnetic energy stored in the armature inductance, while the rest is dissipated through the armature resistance and the transistor.

• When the transistor is turned off, the armature current flows through the diode D and back to the source V, decreasing from ia2 to ia1. During this phase, both the stored magnetic energy in the armature circuit and the energy generated by the machine are returned to the source. The time interval 0 ≤ t ≤ Ton is referred to as the energy storage interval, while the period from Ton to T is known as the duty interval.

WOC has the largest stock of GE AC2000 Drive Control System Replacement Parts. We can also supply unused and rebuilt backup with a warranty. Our team of experts is available around the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

What is the purpose of the AC2000 regenerative chopper circuit module?

The AC2000 is designed to manage excess energy produced during braking operations in DC motor drives. Instead of allowing this energy to be wasted as heat, the module redirects it back into the power system, effectively improving energy efficiency. This function is particularly useful in industrial applications that involve frequent braking cycles, such as cranes, conveyors, or lifting systems.

How much power can the AC2000 module deliver?

The AC2000 is capable of delivering up to 2.1 kW of power. It supports an output current of up to 65 A at 32 V DC. This makes it suitable for medium-scale industrial setups where energy recovery and stable performance are essential.

What is the input power requirement for the AC2000?

The unit requires an AC input voltage of 230 V, with a tolerance range of ±15%. This allows for flexible deployment in a variety of electrical environments without requiring special voltage regulation systems.