GE wind turbine pitch IC3645WP7J11GE1 driver

GE wind turbine pitch IC3645WP7J11GE1 driver

Basic operation and function SSX transistor control Section 

2.1.1.b Control acceleration 

This function allows to adjust the time ratio of control acceleration to 100% of the applied battery voltage. Armature C/A is adjusted from 0.1 second to 22 seconds through function 3. Section 

2.1.2 Current Limiting 

This circuit monitors the motor current by using sensors connected in series with the armature and the field winding. 

The information detected by the sensor is fed back to the card so that the current can be limited to a preset value. 

If a high load current is detected, the circuit will cover the oscillator and limit the average current to the values set by functions 4 and 8 of the mobile phone. 

The C/L setting is based on the maximum thermal rating of the control device. Due to the flyback current through 3REC, the motor current is usually greater than the battery current unless it is 100% conductive. Section 

2.1.3 When the accelerator pedal is released or the brake pedal is depressed, regenerative braking deceleration can be realized by providing an adjusted amount of 

deceleration torque. 

If the vehicle is moving, release the accelerator pedal and the regen signal is activated. Once the regen signal is started, the excitation current Q1 increases (the armature circuit is shown in Figure 5). As shown in fig. 5, the armature current is adjusted according to the regenerative current limit set by function 9. As the vehicle decelerates, the magnetic field current continues to increase. 

The magnetic field current will increase until the preset value set by function 10 is reached. Once the above conditions are met, the regenerative current limit is no longer maintained and the braking function is cancelled. Part of the energy generated by the motor in the regeneration process is returned to the battery, and the other part is released into the motor as heat. Section 2.1.4 Auxiliary Speed Control Section

 2.1.4 Field Weakening 

This function allows the level of field weakening to be adjusted to set the maximum speed of the motor. This function is enabled when the armature current is less than the value set by function 24 and the accelerator input voltage is greater than 2.9 volts. It is worth noting that this function is used to optimize the motor and control performance, and this setting will be determined by GE and electromechanical engineers during vehicle development. Field personnel shall not change this setting without OEM permission. 

Section 2.1.4.b Speed Limiting

This function provides a method to control the speed by limiting the motor voltage with an "adjustable speed limit", which is started by a separate limit switch. The NC switch is connected between the input point on the control card and the positive electrode of the battery. When multiple switch inputs are turned on, the lower limit of motor voltage always takes precedence. The motor voltage limits the maximum speed of the transistor controller, but the actual vehicle speed will change at any set point according to the load of the vehicle. Section 

2.1.4.c Maximum speed adjustment This function requires a system tachometer. Tach, the standard system, is built into the motor, and the armature provides four pulses per revolution. Once the control device is calibrated to the vehicle parameters (gear ratio and wheel rolling radius), the speed can be measured with a resolution of +/- 1 mph using function 

1. When driving downhill, if the vehicle speed increases to the overspeed setting, the control will automatically switch to the regeneration mode. 

The maximum inclination that the controller can maintain adjustment is determined by the motor characteristics, the maximum regenerative armature current limit setting (function 9) and the maximum regenerative magnetic field current limit setting (function 10). When the vehicle reaches the bottom of the slope and the vehicle speed drops below the overspeed setting on the horizontal plane, the control device automatically switches back to the normal driving mode. Section 

2.1.5 Ramp Start This function provides the maximum control torque to restart the vehicle on the ramp. The memory of this function is a directional switch. When parked on a slope, the direction switch must remain in its original or intermediate position to allow the control device to start full power when restarting. 

The accelerator potentiometer input will adjust the ramp start current.

This serial communication port can be used withInteractive Custom Dash Displays to allow changes tovehicle operating parameters by the operator. Or, it can beused by service personnel to dump control operatinginformation and settings into a personal computer program.Section 2.3.4 Circuit Board Coil Driver ModulesA Coil driver is internal to the control card, and is the powerdevice that operate the Line contactor coil. On commandfrom the control card, these drivers initiate opening andclosing the contactor coils. All driver modules are equippedwith reverse battery protection, such that, if the battery isconnected incorrectly, the contactors can not be closedelectrically.