Resources Contact Us Home
Gradient induction heating of a workpiece

Image Number 2 for United States Patent #7582851.

An apparatus and process are provided for gradient induction heating or melting of a workpiece with a plurality of induction coils, each of the plurality of induction coils is connected to a power supply that may have a tuning capacitor connected across the input of an inverter. The plurality of induction coils are sequentially disposed around the workpiece. The inverter has a pulse width modulated ac power output that may be in synchronous control with the pulse width modulated ac power outputs of the other power supplies via a control line between the controllers of all power supplies.

  Recently Added Patents
Packet communication system and packet communication method, and node and user device
Vanadium, cobalt and strontium additives for use in aluminum back solar cell contacts
Light-emitting diode devices
Method and apparatus for communication
Mono-body defibrillation probe
Method and system for providing geohazard information to customers
Triazole derivatives as ghrelin analogue ligands of growth hormone secretagogue receptors
  Randomly Featured Patents
Motorcycle touring fairing
Method for rendering display blocks on display device
Method for preparing lithographic printing plate precursors
Reversible plow
Method and apparatus for adaptive power consumption
Method for controlling vertical type MOSFET in bridge circuit
Dual deposition methods for forming contact metallizations, capacitors, and memory devices
Glass material used in, and fabrication method of, a plasma display panel
Communication system
Charge pump with self-timing and method