PG DRIVES TECHNOLOGY I-DRIVE TECHNICAL MANUAL – INSTALLATION
9 Battery Gauge
Refer to Chapter 1 Sections 8 and 9 for how to read the battery gauge.
The battery gauge will start to flash one bar slowly when the
Battery Lockout function has been triggered. The Battery Lockout
Voltage
setting controls the level at which this indication is given. Refer to Chapter 3.
For optimum accuracy of the battery gauge and low battery indicator, the controller should be programmed with the
approximate nominal capacity of the machine battery. However, accuracy is not greatly affected if the programmed type and
capacity do not closely match the battery.
The most important factor affecting the accuracy of the battery gauge is the resistance of the cable and connections between
the battery and the controller. The controller must be matched approximately to the cable resistance of your machine to make
the battery gauge accurate. Refer to
Chapter 3.
As a guide, 2.5mm
2
cable has a resistance of about 8mΩ per meter; 4 mm
2
cable has about 5mΩ per meter and 6mm
2
has
about 3.3mΩ per meter. Circuit breakers and connectors usually account for about 15mΩ.
These values will be chosen at the time the controller is being specified by the machine manufacturer. Once these values are
decided they are programmed into controllers during manufacture and should never need changing.
If you need advice, contact PGDT
10 Electromagnetic Compatibility (E.M.C.)
The i-Drive controller series has been tested for compliance with the EMC requirements of EN12895:2000. The guidelines in this
section will help you to make sure that your machine installation will meet the requirements. You should consider EMC and
perform relevant tests as early as possible in the design phase.
10.1 Emissions
Observe the following recommendations to minimize radio frequency emissions.
10.1.1 Motor Suppression
Solder a suitable suppression capacitor between the brush holders of each motor, inside the motor cases. Keep the lead length
as short as possible. We recommend a value of 4n7F 250V AC ceramic. The maximum value you should use is 10nF. A typical
type is Roderstein WY0472MCMCF0K.
For 4 pole motors, a capacitor should be fitted between each pair of brushes.
10.1.2 Cables
You do not need to use screened battery and motor looms, but,
• Keep the length of all wiring to a minimum.
• Make sure the loop area of the wiring is minimized. Route the positive and negative wires to each motor
together.
• Route the battery positive and negative wires together. Where possible, route the battery and motor looms
together.
• Secure the motor and battery looms to the machine frame over as much of their length as is practical.
• Do not use the controller connectors as junction points for the battery connections. Separate junction points
away from the i-Drive should be provided for the other electrical machine functions.
SK76977-07 55
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