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Sensorless velocity control and positions of d.c. low-power brush motor
Svoboda, Jan ; Hanák, Pavel (referee) ; Prajzner, Václav (advisor)
This bachelor's thesis focuses on sensorless control of low load brushed DC motor that is used in the actuators made by the Honeywell company. The first part provides an introduction into motor control and common used methods of speed and position sensing of brushed DC motor. Sensorless method of sensing described in this work is the detection of commutation pulses from the signal of motor current. These pulses are caused by brushes leaping over the commutator bars. Correct evaluation of commutation pulses can provide the information about velocity and position of the motor. This relatively new method of detection of commutation pulses is investigated and arising problems are demonstrated on measured samples of signal. Suitable methods of signal processing are then proposed. Infallibility of these signal processing methods is then proved on the set of signals measured under circumstances of supply voltage and abrasion. Then it is decided which signal processing method that sensorless control system can use is the best.
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Design and realization of the DC motor controller for mobile robot
Hrbáček, Jan ; Singule, Vladislav (referee) ; Krejsa, Jiří (advisor)
The goal of the bachelor's thesis is to design a bidirectional electronic speed controller for a brushed DC motor with the power up to 250 W. The background research part introduces various ways of each subsystem's implementation and selects proper technologies to be used to build the controller according to the specification. The description of all important design details, developed firmware functionality as well as design of the prototype and the end product is mentioned in the thesis' part concerning construction. The final controller was successfully tested equipped in the wheeled robot Bender 2. It has been found fully functional and reliable in all operating conditions.
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Sensorless velocity control and positions of d.c. low-power brush motor
Svoboda, Jan ; Hanák, Pavel (referee) ; Prajzner, Václav (advisor)
This bachelor's thesis focuses on sensorless control of low load brushed DC motor that is used in the actuators made by the Honeywell company. The first part provides an introduction into motor control and common used methods of speed and position sensing of brushed DC motor. Sensorless method of sensing described in this work is the detection of commutation pulses from the signal of motor current. These pulses are caused by brushes leaping over the commutator bars. Correct evaluation of commutation pulses can provide the information about velocity and position of the motor. This relatively new method of detection of commutation pulses is investigated and arising problems are demonstrated on measured samples of signal. Suitable methods of signal processing are then proposed. Infallibility of these signal processing methods is then proved on the set of signals measured under circumstances of supply voltage and abrasion. Then it is decided which signal processing method that sensorless control system can use is the best.
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Design and realization of the DC motor controller for mobile robot
Hrbáček, Jan ; Singule, Vladislav (referee) ; Krejsa, Jiří (advisor)
The goal of the bachelor's thesis is to design a bidirectional electronic speed controller for a brushed DC motor with the power up to 250 W. The background research part introduces various ways of each subsystem's implementation and selects proper technologies to be used to build the controller according to the specification. The description of all important design details, developed firmware functionality as well as design of the prototype and the end product is mentioned in the thesis' part concerning construction. The final controller was successfully tested equipped in the wheeled robot Bender 2. It has been found fully functional and reliable in all operating conditions.
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