Drive control device and drive control method that enable stable output to be obtained from vibration type actuator, vibration type drive device including vibration type actuator, and apparatus

A vibration type drive device comprising:

• a vibration type actuator including a vibrator and a contact body that move relative to each other;
• and
• a drive control device configured to control a drive voltage to be applied to the vibration type actuator and a frequency of the drive voltage,
• wherein the drive control device increases the drive voltage to accelerate driving of the vibration type actuator from when the vibration type actuator is started to when a target speed of the relative movement is reached, and the drive control device decreases the frequency of the drive voltage and increases the drive voltage when power supplied to the vibrator exceeds a predetermined power value.

A drive control device for a vibration type actuator including a vibrator and a contact body that move relative to each other, the drive control device comprising:

• an amplification unit configured to amplify a power supply voltage to generate a drive voltage to be applied to the vibrator;
• and
• a control unit configured to control the generation of the drive voltage performed by the amplification unit,
• wherein the drive control device increases the drive voltage to accelerate driving of the vibration type actuator from when the vibration type actuator is started to when a target speed of the relative movement is reached, the drive control device decreases a frequency of the drive voltage without changing the drive voltage when power supplied to the vibrator exceeds a first power value, and the drive control device increases the drive voltage when the power falls below a second power value that is smaller than the first power value during an operation of decreasing the frequency.

A drive control device for a vibration type actuator including a vibrator and a contact body that move relative to each other, the drive control device comprising:

• an amplification unit configured to amplify a power supply voltage to generate an alternating current drive voltage to be applied to the vibrator;
• and
• a control unit configured to control the generation of the drive voltage performed by the amplification unit,
• wherein the drive control device increases the drive voltage to accelerate driving of the vibration type actuator from when the vibration type actuator is started to when a target speed of the relative movement is reached, and the drive control device decreases a frequency of the drive voltage and increases the drive voltage when power supplied to the vibrator exceeds a predetermined power value.

A drive control method for a vibration type actuator including a vibrator and a contact body that move relative to each other, the drive control method comprising:

• a step of increasing a drive voltage to accelerate driving of the vibration type actuator from when the vibration type actuator is started to when a target speed of the relative movement is reached;
• a step of decreasing a frequency of the drive voltage without changing the drive voltage when power supplied to the vibrator exceeds a first power value;
• and
• a step of increasing the drive voltage when the power falls below a second power value that is smaller than the first power value during an operation of decreasing the frequency.