Application Specific Valve Driver Cards

Our new TekBook-110 will now allow mobile users and field operatives to have access to HCT’s full featured standard graphical user interfaces ( GUI’s ) for specialty and DVC product ranges, making programming, set-up, data-logging and modifications easier, simpler and clearer than ever before.

Hydraulic Fan System Controllers such as the HFS controls a hydraulically driven fan system.  The HFS controller accepts three thermistor and two digital inputs and provides a PWM output to control the proportional valve of the fan drive.  The HFS-2 & HFS-2Q adds the reverse or purge feature to the HFS.  And the new HFS-J has the added feature of J1939 CANbus communication.  The latest in the fan control line it the new Plug Top Driver (HFS-3) series with the DIN 43650 footprint and direct connect to low frequency PWM engine ECU fan speed signal.  Or the new HFS-4 with direct connect to low frequency PWM engine ECU fan speed signal.

Hydraulic Generator Controller - The HGC-2 is designed to control a generator driven by a hydraulic motor where speed is controlled by a proportional solenoid valve, either directly at the motor or as part of the pump compensator.  The HGC-2 is a closed loop controller that monitors the AC line voltage from the generator output for outer loop closure and provides the necessary current to a valve coil in order to maintain the desired generator frequency. 

Power-Line (PLD) - The universal single or dual coil PWM driver to stock for your open loop amplifier, electronic HP limiter and closed loop speed control applications.

Standard open loop proportional driver: Control dual or single proportional coils on pumps, directional control valves and other devices in an open loop (no feedback) configuration. Coil current is controlled to match the input command signal. Minimum current setting controls minimum speed or displacement and eliminates dead band. Maximum current setting sets maximum speed or displacement. Auto calibration provides maximum resolution from input device. Can be operated with standard 10K potentiometer (included), or analog signal such as from a joystick. Has fault monitoring for loss of command signal safety.
RPM Regulator Anti-Stall/HP Limiting Controller: Adjusts its’ outputs as a function of the input RPM. Anti-stall, or HP load limiting, progressively de-couples the load from the motor as RPM decreases to avoid stalling the engine. This method is typically used in situations where the operator controls the engine throttle and the load changes independently. The Anti-Stall action is used to prevent a sudden increase in load from causing the engine to stall before the operator has a chance to increase the throttle or decrease the load, or to automatically adjust the load without operator intervention.
Closed Loop Control: Single or dual coil PWM output that adjusts to cause the RPM of a device to precisely match the commanded value. The COMMAND input may be used to set the desired RPM value. Setting the MIN RPM equal to the MAX RPM will cause a fixed RPM regulation set point, but the COMMAND input may still be used to select direction of rotation. The coil current can also be set to whatever value is required to keep the RPM input at the set point value. A PID loop smoothly regulates the RPM by adding to, or subtracting from, the load on the engine, or by controlling the engine throttle.
 

The HAU series valve driver provides precise control of a single coil proportional valve and enables the user to add ramping and/or dither to minimize stiction and hysteresis of the valve.  The HAD series valve driver is the same as the HAU, but drives a dual coil proportional valve.  The LCU, a single coil proportional valve driver tailored for use on low current EDC valves such as Sauer-Danfoss™ 90 series.  The new Plug Top Drivers (PTD) are designed to control single valve coils, and come in 12 or 24V versions that can interface with 4-20mA or 0-10V command signals and connection to any valve with a DIN 43650 interface.

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