Fujitsu MOTORKIT-91F267-MC Gebruikershandleiding - Pagina 8

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MotorKit-91F267-MC User Guide

2 Installation

Carefully remove the board from the shipping carton.

Check if there are any damages before power is applied to the evaluation board.

For the logic power supply a DC input voltage of 9V – 15V is recommended. The

positive voltage (+) must be connected to the shield, and ground (GND) must be

connected to the center of the connector X6!

By default, the DC bus is supplied through the screw terminal J5. Connect to an

adequate power supply for the motor in use (24V max.). Be aware that this input is not

protected against false polarity. Always connect '+' to the terminal close to the upper

board edge, and GND to the one close to X6.

Further, it is strongly recommended to use a laboratory DC power supply with

adjustable current limitation with this board. Otherwise, in case of software or

hardware malfunctions or false configurations, high currents can flow and damage

the power supply and/or the board and lead to overheating by excessive power

dissipation.

After power-on, the green power-on LEDs (LD2 and LD3) should be on, depending on the

configuration of the corresponding jumpers. If the LEDs do not light, switch off the power

supply and check the jumper settings according to the desired configuration.

By default, the evaluation board is equipped with an MB91F267N Microcontroller.

The in-circuit programming allows the user to program an own application into the Flash

memory. Programming of the Flash memory is described in chapter 4.

Depending on the power supply used for the DC bus input, it might be necessary to protect

the power supply against reverse current. This can occur when shutting down the power

supply with the board attached, or when an attached motor is externally accelerated or

quickly decelerated and thereby works as a generator. This protection can be done by a

diode of sufficient current capability. Since many power supplies are vulnerable to this issue,

inserting a shottky diode is recommended.

Depending on the application, the use of an external brake chopper circuit might be

necessary. Typical applications are high-speed or varying load applications, such as

centrifuges or elevators, in which the motor can be also moved by the load. Especially if the

motor can be externally accelerated beyond the nominal speed, high voltages can occur

which may damage the hardware.

The board is shipped with power transistors in a D2PAK package. For additional flexibility,

there are also soldering options for power MOSFETS in TO-220 packages, which can be

mounted on external heat sinks. In this case, probably also the current measurement shunts

should be replaced with a smaller value or bypassed to reduce heat.

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