MMBT589LT1G datasheet(25/28 Pages) ONSEMI

No de pièce	MMBT589LT1G

Description	Compact Intelligent Power Module (IPM) Motor Control Development Kit (MDK) 1 kW

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Fabricant	ONSEMI [ON Semiconductor]

Site Internet	http://www.onsemi.com

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EVBUM2775/D

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GRAPHICAL USER INTERFACE

Open loop operation (V/F)

In order to facilitate fast evaluation of the power stage, the

user can select open loop operation option within the GUI

menu.

FOC closed loop operation

Modern control drives implement the well−known Field

Oriented Control (FOC) control−strategy; FOC provides

efficient motor−drive for a wide range of motor−speeds, fast

dynamic response, a low harmonic content of currents, and

reduced losses [8−10].

In general, the implementation of FOC requires at least:

• 1 Timer

• 4 ADC channels (see Note below)

• USART/SPI for communications

• Capture/PWM

FOC should achieve:

• High control bandwidth

• Low current distortion

• Control capability at low speeds

Figure 26. Graphical User Interface for Controlling the Motor in the Open Loop

NOTE:

One channel for the voltage level of the VSI H−Bridge, and three channels for the – three – phase currents that flow

towards the motor. However, it is possible to implement the FOC strategy with only three ADC channels (two

channels for current and one channel for the voltage), as we can measure two−phase currents and mathematically

calculate the third one. That implementation requires one shunt−resistor less. Compact IPM, thought, comes

already with three shunt−resistors.

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