PG DRIVES TECHNOLOGY AC TRACTION – INSTALLATION
1 Introduction
The Sigmadrive is an advanced digital controller for all popular motor types and is designed for electric vehicle applications such
as Industrial Trucks, Personnel Carriers, Golf Cars, Aerial Work Platforms and Materials Handling Equipment.
Advanced drive algorithms are employed to ensure smooth, accurate, predictable and efficient control of vehicle speed and
torque. Motor reversing and regenerative braking in both directions is achieved via solid-state electronics.
The Sigmadrive has been designed to easily withstand the harsh operating environments that electric vehicles typically endure.
State-of-the-art construction techniques ensure the controller can withstand shock, vibration and extremes of temperature. To
ensure the Sigmadrive installation is as robust as possible, follow the guidelines in this manual.
2 Guidelines For Working On Electric Vehicles
2.1 Precautions For Working On Electric Vehicles
Working on any electrical system can be dangerous. Work on electric vehicles should only be undertaken by skilled or supervised
persons, in a segregated location that eliminates the risk of injury to other persons. Before performing any kind of work on electric
vehicles, ensure that the following basic safety advice is followed.
2.1.1 Uncontrolled Operation
Fault conditions or programming changes may cause the motor to run out of control. Disconnect the motor or raise the drive
wheels above the ground. If lifting the vehicle, use the correct jacking procedure as recommended by the vehicle manufacturer
to lift the vehicle’s drive wheels clear of the ground. Once lifted, fit axle stands to safely support the vehicle and remove the jack.
Ensure that all such lifting equipment is in serviceable condition and suitable for the vehicle in question.
2.1.2 High Current Arcs
Batteries contain very high levels of energy and can be extremely dangerous if mishandled or abused. Always disconnect the
batteries before working on the vehicle’s electrical system and the motor controller wiring. Remove all jewellery from wrist and
fingers and use properly insulated tools to prevent shorts. Wear safety glasses at all times.
2.1.3 Lead Acid Batteries
Charging or discharging lead acid batteries generates hydrogen gas, which can build up in and around the battery area. Ensure
charging is performed in a ventilated area. Follow the battery manufacturer’s safety recommendations. Wear safety glasses at all
times.
2.2 Precautions For Use
Do not drive the vehicle:
• Beyond restrictions indicated in your vehicle user manual, for example inclines, curb heights etc.
• In places or on surfaces where a loss of wheel grip could be hazardous, for example on wet grassy slopes.
• If you know that the controller or other crucial components require repair.
SK79646-01 9
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