Resources Contact Us Home
Motor control device

Image Number 18 for United States Patent #5872439.

A motor control device for controlling a swing motor which moves a head is provided with a disturbance observer and an operation suspending unit. The disturbance observer outputs a compensating signal for compensating a driving voltage V for driving the swing motor. The operation suspending unit suspends an operation of the disturbance observer, based on a detection signal supplied by a velocity sensor which detects an angular velocity of the swing motor and the driving voltage signal V for driving the swing motor. The operation suspending unit operates when the signal voltage in the disturbance observer exceeds a reference level. This arrangement solves the following problem arising when the disturbance observer is employed for controlling a motor: when the motor comes into collisions with a stopper at an edge of the motion space, the disturbance observer further drives the motor so as to oppose a motion caused by the collisions, thereby exacerbating the collision.

  Recently Added Patents
Ignition device in particular for an internal combustion engine, and method for manufacturing same
Sub-resolution assist feature repair
Droplet generation and detection device, and droplet control device
Automatic fixup of network configuration on system image move
Routing of data including multimedia between electronic devices
Sensor system
Visibility radio cap and network
  Randomly Featured Patents
Backlight module having light-shielding layer under two adjacent fluorescent layers and a liquid crystal display using the same
Powerful, collapsible, compact spear gun
Measuring apparatus and method for detecting moisture at a measurement voltage input of the measuring apparatus
Display device having a thin film transistor
Variable and bidirectional steam flow apparatus and method
Method of arthroscopically preparing an articular bone surface
Process for preparing polyester elastomers
Protective barrier and method of providing same for thermosensitive sheet
Microwave oven
Centrifugal extractor for organic phase using a height-adjustable weir and a divert disk