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Description
In a heavy-duty mining operation, a semi-autogenous grinding (SAG) mill requires massive amounts of torque to crush ore. The mill is driven by a 10MW medium-voltage variable frequency drive. Inside this drive, the ABB 3BHB020720R0002 acts as the primary switching element within the inverter stage.
Unlike standard drives that might struggle with the immense electrical stress of starting a stationary mill loaded with tons of rock, the ABB 5SHY3545L0016 handles the high current surges with ease. It switches the DC link voltage into a precise AC waveform to control the motor speed. If a standard component were used, the heat generation and switching losses could lead to thermal runaway. However, the low conduction losses of the ABB 5SHY3545L0016 ensure the drive operates efficiently, preventing costly production stoppages and reducing the load on the facility’s cooling systems.
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Technical Principles and Innovative Values
The ABB 3BHB020720R0002 utilizes IGCT technology, which combines the best features of GTOs (Gate Turn-Off thyristors) and BJTs (Bipolar Junction Transistors).
Innovation Point 1: Hard Drive Technology
The ABB 5SHY3545L0016 employs “hard drive” gate control. This means the gate driver is integrated directly into the device package, allowing for extremely fast turn-off times. Unlike traditional thyristors that rely on the circuit to commutate, the IGCT can actively switch off high currents instantly, providing superior control over the power flow.
Innovation Point 2: Low Conduction Losses
One of the key advantages of the ABB 3BHB020720R0002 is its incredibly low on-state voltage drop. This results in significantly lower heat generation compared to IGBTs at similar power levels. This efficiency allows for simpler cooling systems (often just water cooling) and reduces the total cost of ownership for the drive system.
Innovation Point 3: Series Connection Capability
The ABB 5SHY3545L0016 is designed with tight parameter tolerances, allowing multiple modules to be connected in series without complex derating. This is crucial for medium voltage applications (e.g., 3.3kV, 4.16kV, or higher), where a single device cannot block the total voltage. This feature simplifies the topology of high-power inverters.
