Datasheet MC33039, NCV33039 (ON Semiconductor) - 3
| Fabricante | ON Semiconductor |
| Descripción | High performance closed-loop speed control adapter for use in brushless DC motor control systems |
| Páginas / Página | 11 / 3 — MC33039, NCV33039. Figure 1. Typical Three Phase, Six Step Motor … |
| Formato / tamaño de archivo | PDF / 362 Kb |
| Idioma del documento | Inglés |
MC33039, NCV33039. Figure 1. Typical Three Phase, Six Step Motor Application. OPERATING DESCRIPTION. www.onsemi.com
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MC33039, NCV33039
Rotor Electrical Position (Degrees) 0 60 120 180 240 300 360 480 600 720 fA 60 Sensor Electrical Phasing fB Input fC fA 120 Sensor Electrical f Phasing B Input fC fA Output Latch ISetI Input Vth 0.67 VCC RT/CT Vout (AVG) fout Output Constant Motor Speed Increasing Motor Speed
Figure 1. Typical Three Phase, Six Step Motor Application OPERATING DESCRIPTION
The MC33039 provides an economical method of loop application using the MC33035 brushless motor implementing closed-loop speed control of brushless DC controller. Constant speed operation down to 100 RPM is motors by eliminating the need for a magnetic or optical possible with economical three phase four pole motors. tachometer. Shown in the timing diagram of Figure 1, the The fA inverter output (Pin 4) is used in systems where three inputs (Pins 1, 2, 3) monitor the brushless motor rotor the controller and motor sensor phasing conventions are not position sensors. Each sensor signal transition is digitally compatible. A method of converting from either convention detected, ORied at the Latch iSeti Input, and causes CT to to the other is shown in Figure 3. For a more detailed discharge. A corresponding output pulse is generated at fout explanation of this subject, refer to the text above Figure 39 (Pin 5) of a defined amplitude, and programmable width on the MC33035 data sheet. determined by the values selected for RT and CT (Pin 6). The The output pulse amplitude VOH is constant with average voltage of the output pulse train increases with temperature and controlled by the supply voltage on VCC motor speed. When fed through a low pass filter or (Pin 8). Operation down to 5.5 V is guaranteed over integrator, a DC voltage proportional to speed is generated. temperature. For systems without a regulated power supply, Figure 2 shows the proper connections for a typical closed an internal 8.25 V shunt regulator is provided.
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Rotor Electrical Position (Degrees) 0 60 120 180 240 300 360 480 600 720 fA 60 Sensor Electrical Phasing fB Input fC fA 120 Sensor Electrical f Phasing B Input fC fA Output Latch ISetI Input Vth 0.67 VCC RT/CT Vout (AVG) fout Output Constant Motor Speed Increasing Motor Speed
Figure 1. Typical Three Phase, Six Step Motor Application OPERATING DESCRIPTION
The MC33039 provides an economical method of loop application using the MC33035 brushless motor implementing closed-loop speed control of brushless DC controller. Constant speed operation down to 100 RPM is motors by eliminating the need for a magnetic or optical possible with economical three phase four pole motors. tachometer. Shown in the timing diagram of Figure 1, the The fA inverter output (Pin 4) is used in systems where three inputs (Pins 1, 2, 3) monitor the brushless motor rotor the controller and motor sensor phasing conventions are not position sensors. Each sensor signal transition is digitally compatible. A method of converting from either convention detected, ORied at the Latch iSeti Input, and causes CT to to the other is shown in Figure 3. For a more detailed discharge. A corresponding output pulse is generated at fout explanation of this subject, refer to the text above Figure 39 (Pin 5) of a defined amplitude, and programmable width on the MC33035 data sheet. determined by the values selected for RT and CT (Pin 6). The The output pulse amplitude VOH is constant with average voltage of the output pulse train increases with temperature and controlled by the supply voltage on VCC motor speed. When fed through a low pass filter or (Pin 8). Operation down to 5.5 V is guaranteed over integrator, a DC voltage proportional to speed is generated. temperature. For systems without a regulated power supply, Figure 2 shows the proper connections for a typical closed an internal 8.25 V shunt regulator is provided.
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