César Cases

  • Citations Per Year
Learn More
Voltage-sensitive calcium channels play a key role in evoked neurotransmitter release and their distribution in presynaptic membranes can be critical for fast signalling at chemical synapses. Using a biotinylated derivative of the neuronal calcium channel antagonist, omega-conotoxin, and a combination of colloidal gold labeling and freeze-fracture(More)
In high frequency induction heating applications, the inverters used to generate the high frequency alternating current are implemented with MOSFET. In order to avoid the failure of the MOSFET intrinsic diode, each switch is formed by two extern diodes which are connected to the MOSFET, one in series, and the other one in anti-parallel with both devices. If(More)
This paper analyses the behaviour of the DC-link of a high power (50 kW), high frequency (150 kHz) voltage fed inverter with a series resonant load circuit for industrial induction heating applications which is characterized by a full bridge inverter with a power control based on pulse density modulation (PDM). The operation of this power control strategy(More)
In induction heating applications, the component being heated is very close to the heating coil. Due to the high temperatures reached during the process, isolation is not always possible and short-circuits may happen. Two main types of short-circuit should be considered: complete inductor's short-circuit and short-circuit between windings. Parallel resonant(More)
This paper aims to determine the maximum frequency achievable in a 25 kW series inverter for induction heating applications and to compare, in hard switching conditions, four fast transistors IGBTs 600A and 1200V modules encapsulated in 62mm from different suppliers. The comparison has been done at 25 and 125ºC in a set-up. Important differences(More)
A new firing strategy for a resonant current fed inverter based in switches formed only by IGBTs, without the series diode, is presented in this paper. It is described the behavior of the inverter topology proposed and two different strategies for its reliable operation are explained: control of the switching current level, and control of the over-current(More)
  • 1