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The forklift uses the AC governor controller and AC oil pump governor controller and features the stepless
speed variation, smooth lifting and stable operation and has reliable performance. The maintenance load is low.
In comparison with the resistance speed regulation, it can save ca. 20-30% electricity. The working principle is
summarized as below: The AC controller and AC traveling motor are connected in series on the voltage of
battery pack, because of the modification of the pulse width produced by the micro-processing logic unit, which
changes the average current at the motor, so the speed of motor is also changed and possesses at the meantime
the regenerative braking function. For the detailed working principle, please read the Electric Control
Instructions.
The voltage of battery pack is 48V. Each one is composed of 24 batteries with the voltage 2V. The main loop
and control loop are powered by 48V voltage. The lighting lamp and buzzer etc., are powered by 12V voltage.
The protections of main circuit overload and short-circuit will be achieved by the fuses F1 and F3 and the short-
circuit protections of control and lighting loops are implemented by F4～F7 fuses.
4.6.2 Operating method
When it is necessary to work with the forklift, insert at first the power plug, turn off the hand brake switch, turn
on the key switch, the indicator light on the instrument panel is lit. If it is necessary to have the forklift move,
push the direction switch to the preset position (forward or backward), and then depress the acceleration pedal,
the controller is working, the traveling motor starts running and the forklift will move in the preset direction.
The travel speed is determined by the journey of pedal depressed. When the pedal is depressed to the end, the
speed maximizes, when the driver's foot leaves the brake pedal, the pedal will reset under the effect of spring
and the controller works, so the traveling motor stops running and the forklift stops the operation. When the
forklift is climbing on slop or drives at full speed, you should depress to end the pedal. Now, the controller has
the motor output the maximum torque and the forklift can produce the maximum driving force. When the cargo
handling is required, you just place the lift lever or tilting lever to the corresponding position and close the
lifting switch MK, the lifting motor starts working. E.g. the lifting of pallet fork: When the goods lifting is
needed, just place the lift lever onto the lifting position, the lifting motor starts working, the pallet fork rises.
Release the handle until it is lifted to the preset position, the lifting switch MK is disconnected, the lifted motor
stops working and the pallet fork stops lifting. Both the tilting forward and backward of pallet fork are similar.
When the pallet fork is lifted to the top and tilts forward or backward to the limiting position, the operation
handle should be quickly returned to the middle position.
Headlamp, clearance light and tail lamp are controlled by the light switch on the instrument panel. The 1st
position is the clearance light and rear clearance lamp; the 2nd, the headlamp and turn signal light are controlled
by the turn signal light switch fitted on the instrument panel. Besides, the turning indicator light is also fitted on
the instrument panel. When the alarm is necessary, just pressed the horn button, the horn will be buzzing. The
brake light is controlled by the brake light switch.
4.6.3 Battery
4.6.3.1 Construction of battery
The battery is mainly composed of the positive plate, negative plate, partition, battery cap and electrolyte
solution.
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General