Z8FMC160100KIT Zilog, Z8FMC160100KIT Datasheet - Page 3

• Manufacturer Part Number: Z8FMC160100KIT
• Description: KIT DEV FOR Z8 ENCORE Z8FMC16100
• Manufacturer: Zilog
• Series: Z8 Encore! MC™r

Specifications of Z8FMC160100KIT

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: Z8FMC16100
• Primary Attributes: 3-Ph DC Motors
• Secondary Attributes: Graphic User Interface
• Processor To Be Evaluated: Z8FMC16100
• Data Bus Width: 8 bit
• Interface Type: USB
• For Use With: 269-4664 - KIT ACC OPTO-ISO USB SMART CABLE269-4661 - KIT ACC ETHERNET SMART CABLE269-4539 - KIT ACCESSORY USB SMART CABLE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3639

•
Furthermore, two voltage application techniques can be applied, based on the configuration of the supply-to-
motor windings:
•
•
In this application, sensorless control with a trapezoidal waveform is implemented. This implementation is
very common in small BLDC motors used in many White Goods and other consumer-based products.
The block diagram of the BLDC motor control system is shown in
Z8FMC16100. In a 3-Phase commutation arrangement, at any given instance, only two phases are energized.
The back EMF voltage is in turn generated in the unenergized phase winding, and the zero crossing of this
induced voltage is detected for synchronization of the subsequent closed-loop control events. As discussed
later, the innovative Time Stamp feature of the Z8FMC16100 MCU provides for robust, efficient
implementation of this critical sensing function without the requirement for an additional comparator.
AN022602-0810
additional hardware for sensor interface.
Sensorless commutation–In the sensorless commutation technique, the back-EMF induced in the idle
phase is used to determine the moment of commutation. When the induced idle-phase back-EMF equals
one-half of the DC bus voltage, commutation is complete.
The advantage of sensorless commutation is that it makes the hardware design simpler. No sensors or
associated interface circuitry are required. The disadvantages are that it requires a relatively complex
control algorithm, and, when the magnitude of induced back-EMF is low, it does not support low motor
speeds.
Sinusoidal–Sinusoidal voltage is applied to the three-phase winding. Sinusoidal voltage provides a smooth
motor rotation and fewer ripples.
Trapezoidal–Here DC is applied to two phases at a time, and the third phase is left idle. Trapezoidal
voltage is simpler to implement and less complex.
Sensorless Brushless DC Motor Control with Z8 Encore! MC
Figure 1
on page 4 and is based on
TM
Microcontrollers