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Uni Instructions

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“We're in Control”

“We're in Control”

Instruction Manual

Uni series controllers

Issue 07

2

Introduction

2

Models

2

Motors

2

Safety

3

Features

3

Specifications

4

Mounting

4

Connections

5

Power Connections

5

Battery wiring

5

Motor wiring

5

Controls

6

Battery Condition Indicator

6

Internal 4 pin connector

7

Adjustments

7

Gain

7

Acceleration ramp

7

Deceleration

7

Braking

7

Reversing

8

Heat & Heatsinking

8

Use as voltage follower.

4QD’s Uni range of 1 quadrant and 2 quadrant speed
controllers are well suited to general purpose speed
control applications. They are used extensively by
hobbyists and industry.

Amongst other applications our controllers have been
successfully used in the following:
Camera dollies
Caravan shifters
Carnival floats
Conveyors
Electric boats
Electric bicycles
Electric wheelbarrows
Factory stores vehicles
Floor cleaning machines
Golf caddies
Kiddie cars
Miniature railways, 3”, 5” and 7¼ gauge
Mountain rescue vehicles
Potter’s wheels
Remote controlled vehicles
Ride on golf buggies
Winches
Window cleaning machines

Wherever battery motor speed control is required

.

Date printed: 27th January 2015

Models

2 models are  available, for different current ratings. in various versions and with regenerative braking / no
braking option.

12v

24v

36v

48v

Current

Uni-4-12

Uni-4-24

Uni-4-36

Uni-4-48

40 Amps

Uni-8-12

Uni-8-24

Uni-8-36

Uni-8-48

80 Amps

Summary of Contents for Uni Series

Page 1: ...trol applications They are used extensively by hobbyists and industry Amongst other applications our controllers have been successfully used in the following Camera dollies Caravan shifters Carnival floats Conveyors Electric boats Electric bicycles Electric wheelbarrows Factory stores vehicles Floor cleaning machines Golf caddies Kiddie cars Miniature railways 3 5 and 7 gauge Mountain rescue vehic...

Page 2: ...lso suggest you fit a motor suppression capacitor A 10n ceramic across the motor brushes as close to the motor as possible can greatly increase system reliability Some motors are available with this capacitor fitted as a manufacturing option Safety It is normal practise on passenger carrying vehicles to include some means of disconnecting the battery or motor in an emergency This is normally to gu...

Page 3: ...l speed adjustable Output current max typ 115 amps 100 amps regen 1 minute rating 85 amps without additional heatsink 2 minute rating 45 amps without additional heatsink continuous 30 amps or more heatsink dependant voltage drop at 20a 130mV Overheat current 25 amps typical Overheat temperature 95 C on heatsink Switching frequency 20kHz approximately Acceleration time 330mSec to 7 Sec adjustable D...

Page 4: ...inium or even copper Make sure the controller cannot get wet normally when mounted as shown and correctly covered water cannot get onto the circuit board and water on the base will do no harm Make sure water cannot run down the wires into the controller Heatsink mounting holes are tapped M3 and spaced at 25 4mm 1 The integral heatsink is isolated Mounting Connections The diagram shows the simplest...

Page 5: ...ections Controls The only external control the UNI needs is a speed pot shown in the diagram below left There are other controls that you may add if you wish The Uni turns itself off automatically when you turn the speed to zero so you can fit an on off switch in series with the red wire as shown in the diagram below right Opening this will remove the voltage from the pot so the controller will ru...

Page 6: ...d bare board controllers are supplied with a mating connector shown below This is an Insulation Displacement Connector IDC do not strip the insulation from the wires simply push them into the top part of the open connector from the knobbly side and squeeze it closed in a vice or with suitable parallel action pliers The mating connector supplied is suitable only for the correct size of wire Accepta...

Page 7: ...ng above Important use an insulated screwdriver when making adjustments the metal centres of the adjustments are live to the internal circuitry If a non insulated screwdriver touches anything other than a preset the circuit can be damaged Gain Adjust this so that at maximum required pot rotation the controller just reaches full speed This is easiest to do with the motor unloaded i e with the wheel...

Page 8: ...ically adjusts However running the controllers at full current will cause speedy heating However at some temperature well above 100 C the MOSFETs will become unsafe so we suggest that during initial use you keep a note of the heatsink temperature and if it becomes much too hot to touch take appropriate steps either by mounting the Uni onto additional heatsinking or better still fit a higher rated ...

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