Power Bridge Module

/Power Bridge Module
Power Bridge Module2020-05-08T13:49:16+02:00

Power Bridge Module

General

The power bridge module is a GOcontroll Moduline II compatible expansion card to add a high power H-bridge to your modular controller. Instead of single bridge configuration, the module can also be used as 2 high power half bridges. Beside a C library, the module can also be configured with an available Matlab Simulink function block1.

Applications

  • Bi directional control of inductive and resistive actuators

  • High side or low side actuator control as switch (on-off)

  • High side or low side actuator control with duty cycle (0-100%)

  • Half bridge actuator control

  • Full bridge actuator control

  • Current controlled actuators

Features

  • Continuous current up to 18 A

  • Can be used as full bridge, 2x half bridge, high and/or low side switch (on-off and duty cycle controlled)

  • Current of each channel can be read out (only for high side configuration)

  • Each output is short circuit and over temperature protected.

  • Module supply is reverse polarity protected

  • Module power supply is load dump protected (ISO 7637)

  • Bad ground connection detection (earth loop protection)

  • External supply voltage range from 6 to 24 Volt

Schematic representation

Local control an monitoring of output

Communication with processor board

Module rail supply

Output channel 1

Output channel 2

Module ground

Software configurable interface circuit

Technical information

Information is applicable for each channel

min nom max
Supply rail voltage (normal operation) 6 24 Volt
Maximum current when individual channel is used 15 A
Maximum current in H-bridge configuration 15 A
Switching frequency (duty cycle selected) 1 21 kHz
Duty cycle resolution 0,1 %

Pinout controller connector

The module supply and output ports are directed from the module to the controller connectors. Each connector interfaces 2 modules. Only the half of the pins of one connector are dedicated to one module. Refer to the document ‘Processor board  guidelines’ for more specific information about module location and connector selection. Be aware of the location of the installed module before wiring the connector.

Module located on: 1-3-5-7

Module located on: 2-4-6-8

Module rail supply (internal connected)

Module ground

Output channel 1

Output channel 2

Module rail supply (internal connected)

Module ground

Output channel1

Output channel 2

Be aware to connect all the supply pins and ground pins before controlling any actuator. By connecting only one or two pins, the processor board and module are not able to distribute the amount of current that is required. The processor board and module can be permanently damaged.

Model based software development

The GOcontroll Moduline II controller can be programmed with Matlab Simulink. By easily drag and drop function blocks into your Simulink model, no knowledge about any programming language is needed to build a control system. Inside the model, you can use a function block that is designed for the power bridge module. This function block enables you to configure the two output channels according to you demands using a graphic interface. The explanation of each configuration can be found inside the function block.

Signal input for the corresponding output channel

Module name

The module connector on the processor board where the module is connected to

Module article number

By double clicking the function block, the mask will open. Here you can configure your 6 channel output module according your demands

The sample time determines the function block execution frequency. -1 is deafult and doesn't have to be changed

Select the module connector on the processor board on which the module is plugged in to

Ouput channel to configure

Select the desired function of the ouput channel

In case of duty cycle control, select the frequency

Apply the configuration of the module

Function select

You can configure each output channel according your demands. For example, if you want to switch on or of a valve by controlling the supply of the valve, you can select the high side switch on/off function.

Half bridge duty cycle controlled 0 – 100% (0-1000)

With this function you can control an actuator with a half bridge. A value from 0 to 1000 controls an actuator with a duty cycle from 0 to 100%. The duty cycle percentage controls the active high stage. for example, if the value of 650 is send to a specific output channel, the output will be controlled to the rail supply for 65% of the period time. 35% of the period time will be controlled to ground. The switching frequency can be selected from the frequency box in the function block.

Low side switch duty cycle controlled 0 – 100% (0-1000)

If you want to control an actuator by switching to ground using duty cycle, you can select this function. A value from 0 to 1000 controls an actuator with a duty cycle from 0 to 100%. 0% means that the low side is floating. 100% switches the actuator to ground for 100% of the period time.  The switching frequency can be selected from the frequency box in the function block.

High side switch duty cycle controlled 0 – 100% (0-1000)

If you want to control an actuator by switching to the rail supply using duty cycle, you can select this function. A value from 0 to 1000 controls an actuator with a duty cycle from 0 to 100%. 0% means that the high side is floating. 100% switches the actuator to the rail supply for 100% of the period time.  The switching frequency can be selected from the frequency box in the function block.

Low side switch on – off

In case of switching actuators on or off by switching to ground, you can select the low side switch. By sending a 1 or higher, the switch will be switched on. 0 will switch off the actuator.

High side switch on – off

In case of switching actuators on or off by switching to the rail supply, you can select the high side switch. By sending a 1 or higher, the switch will be switched on. 0 will switch off the actuator.

Full bridge functionality

If you want to use the module as a high power H bridge, you have to select the half bridge function for each channel. By only controlling one channel with a duty cycle, you are able to control your actuator in both directions. It is strongly recommended to use the same duty cycle frequency for both output channels.

1  The function blocks are designed on top of the available, open source blockset of HAN Automotive Research. More information and downloads can be found on: www.openMBD.com