ALSTOM ALSPA series frequency converter

Rolling mill (reversible rolling requires four quadrant operation)

Mine hoist (potential load, regenerative energy feedback to the power grid)

Plastic extruder (constant torque, low speed, high current)

6.2 High current rectification system

For applications such as electrolysis and electric arc furnaces that require tens of thousands of amperes of direct current, ALSTOM provides direct water-cooled thyristor cabinets. For example, aluminum electrolysis plants typically require a power supply of 4 × 60kA or 5 × 70kA, 1000Vdc. Every 12 pulse bridge arms can provide over 60000A of current, with a large number of successful operational achievements worldwide.

6.3 Static Var Compensation (SVC)

ALSPA also offers the PQS series static reactive power compensation system for flicker compensation and power factor correction in electric arc furnaces. This belongs to the power quality solution and is often supplied in conjunction with the transmission system.

System Integration and Project Management Services

ALSTOM not only provides driver components, but also offers complete system design and engineering services, including:

Automation system integration (PLC, DCS interface)

Full project general contracting management (from conceptual design to commissioning and delivery)

Manufacturing of large motors and generators (supplied in conjunction with transmission)

For system integrators, ALSTOM can provide "white label" driver modules to help integrators build their own brand of driver solutions. This includes low-voltage modules, inverters, rectifiers, with a maximum capacity of 3.6MW.

Global Service and Lifecycle Support

ALSTOM's service philosophy is that customer relationships truly begin when the system is put into operation. Its global service network covers all continents and provides the following support:

8.1 Basic Services

24-hour telephone hotline

Emergency fault on-site response

Remote diagnostic facility (connected to the driver controller via modem or VPN)

Service and Maintenance Contract (Regular Inspection, Preventive Maintenance)

8.2 Spare Parts and Outdated Management

Spare parts supply and inventory management (including consignment warehouses)

Outdated management plan: When a certain model is discontinued, provide an upgrade path or alternative solution to avoid users being forced to make unplanned modifications.

8.3 Training and Optimization

Training Center (covering operation, maintenance, and advanced programming)

Maintenance engineering (providing status monitoring and life assessment)

Factory and system optimization (energy efficiency audit, process improvement)

Upgrades and enhancements (such as converting old DC drives to AC drives, or upgrading control platforms to PEC)

How to Choose ALSPA Transmission: Engineer Decision Framework

In practical projects, facing such a broad product line of ALSPA, it is recommended to screen according to the following steps:

Determine motor type and power: induction motor or synchronous/wound rotor? Does the power exceed 5MVA? If exceeded, it is necessary to enter the medium voltage transmission selection.

Determine voltage level: Is the current grid voltage low voltage (≤ 690V) or medium voltage (2.3kV-13.8kV)? Medium voltage transmission can choose models without output transformers to save investment.

Determine operating quadrant: Is it necessary to operate in four quadrants (regenerative power generation)? If necessary, choose a rectifier unit with energy feedback (such as AFE).

Control performance requirements: Ordinary fans and pumps can choose V/f control; High dynamic response (such as cranes and rolling mills) requires closed-loop vector control and may require encoder interfaces.

Communication and automation integration: Confirm the fieldbus types (Profibus, Modbus TCP, EtherNet/IP, etc.), and the PEC platform supports almost all of them.

Environment and Services: Is it located in a remote area? Need to assess the coverage level of the local service network. ALSTOM has core centers in France, Germany, the United Kingdom, and the United States, but covers the globe through partnerships.

Common technical problems and troubleshooting ideas (based on PEC platform)

10.1 No display after power on transmission

Check if the control power supply (usually 24Vdc or 110Vac) is functioning properly.

Check the fuses or power modules of the PEC control board.

Using Drive Data Manager ™ Keyboard attempts to connect, if the keyboard displays but the HMI does not display, it may be a backlight or LCD cable issue.

10.2 The motor does not rotate but there is no fault code

Check if the startup command (DI or communication) is activated.

Check if the speed setpoint is zero or below the minimum speed.

Check the "Enable" and "Run" bits in the status word. The PEC platform can monitor the input and output of functional blocks online.

10.3 Overcurrent tripping

Check the insulation of the motor and whether there is a short circuit to ground in the cables.

Check if the acceleration time is too short, causing a current spike.

For vector control, check if the motor parameter self-tuning is complete. ALSPA transmission typically supports static and dynamic identification.