Answers to SPARKS Magazine – May Issue 2015
... inadvertently be reinstated. A padlock or suitable locking device can be used for this purpose. Caution notices will also be required at the point(s) of isolation. In the event that more than one person will be working on the isolated circuit or equipment it is advisable that each person has a uniqu ...
... inadvertently be reinstated. A padlock or suitable locking device can be used for this purpose. Caution notices will also be required at the point(s) of isolation. In the event that more than one person will be working on the isolated circuit or equipment it is advisable that each person has a uniqu ...
“Positive Only” Gate Drive IGBTs Created by Cres Minimization
... a high dv/dt is applied to the IGBT in a half bridge topology. However, providing the negative bias adds gate drive complexity. It also makes it difficult to use high voltage IC drivers because the ICs are designed to operate at ground reference – the same as the control circuitry. Thus it would be ...
... a high dv/dt is applied to the IGBT in a half bridge topology. However, providing the negative bias adds gate drive complexity. It also makes it difficult to use high voltage IC drivers because the ICs are designed to operate at ground reference – the same as the control circuitry. Thus it would be ...
Custom micro beam steering solutions
... frictionally coupled to the mirror or prism. Tiny, ultrasonic vibrations of the motor cause the mirror to move with smooth and precise motion (figure 7). These “all in-one” smart modules require no separate electronics and are ready to ...
... frictionally coupled to the mirror or prism. Tiny, ultrasonic vibrations of the motor cause the mirror to move with smooth and precise motion (figure 7). These “all in-one” smart modules require no separate electronics and are ready to ...
Half Bridge Gate Driver
... - 3-Phase half-bridge gate drivers - Common-mode dv/dt noise canceling circuit - Allowable – Vs swing to – 9.8V @VBS = 15V - Built-in UVLO function for VBS and VDD - Shoot through prevention with dead-time - Sourcing/Sinking Current 350mA/650mA ...
... - 3-Phase half-bridge gate drivers - Common-mode dv/dt noise canceling circuit - Allowable – Vs swing to – 9.8V @VBS = 15V - Built-in UVLO function for VBS and VDD - Shoot through prevention with dead-time - Sourcing/Sinking Current 350mA/650mA ...
Lectures 10-11 Effect of source inductance on phase controlled AC
... The presence of source inductance means that commutation of load current from one thyristor to the next, as they are triggered with a firing angle α, can not be instantaneous. This source inductance, Ls, is invariably because of the inductance of the supply lines and the leakage inductance of the in ...
... The presence of source inductance means that commutation of load current from one thyristor to the next, as they are triggered with a firing angle α, can not be instantaneous. This source inductance, Ls, is invariably because of the inductance of the supply lines and the leakage inductance of the in ...
Non-Contact High Voltage Detector
... field strength. The radiated field strength quickly decreases with distance and/or ground shielding. The radiated field from a cable where conductors supplying 3-phase power are close together tend to cancel out. The rotary switch, or attenuator, is used to identify and differentiate various HV live ...
... field strength. The radiated field strength quickly decreases with distance and/or ground shielding. The radiated field from a cable where conductors supplying 3-phase power are close together tend to cancel out. The rotary switch, or attenuator, is used to identify and differentiate various HV live ...
Comprehensive circuit protection for control panel applications
... When applications call for compliance with the National Electrical CodeT (NECT) and UL requirements for branch circuit protection and disconnecting means, choose from the industry’s most extensive line of UL 489 circuit breaker products and accessories. ...
... When applications call for compliance with the National Electrical CodeT (NECT) and UL requirements for branch circuit protection and disconnecting means, choose from the industry’s most extensive line of UL 489 circuit breaker products and accessories. ...
Comprehensive circuit protection for control panel applications
... When applications call for compliance with the National Electrical CodeT (NECT) and UL requirements for branch circuit protection and disconnecting means, choose from the industry’s most extensive line of UL 489 circuit breaker products and accessories. ...
... When applications call for compliance with the National Electrical CodeT (NECT) and UL requirements for branch circuit protection and disconnecting means, choose from the industry’s most extensive line of UL 489 circuit breaker products and accessories. ...
Aalborg Universitet
... harmonic current mitigation a challenging task especially with three-phase diode bridge rectifier, which still is preferred in many power electronic systems. This paper addresses a novel current modulation strategy using a single-switch boost threephase diode bridge rectifier. The proposed method ca ...
... harmonic current mitigation a challenging task especially with three-phase diode bridge rectifier, which still is preferred in many power electronic systems. This paper addresses a novel current modulation strategy using a single-switch boost threephase diode bridge rectifier. The proposed method ca ...
PS-5006
... –25°C to 70°C. Temperature in combination with voltage can affect the lifetime of a supercapacitor. In general, raising the ambient temperature by 10°C will decrease the lifetime of a supercapacitor by a factor of two. As a result, it is recommended to use the supercapacitor at the lowest temperatur ...
... –25°C to 70°C. Temperature in combination with voltage can affect the lifetime of a supercapacitor. In general, raising the ambient temperature by 10°C will decrease the lifetime of a supercapacitor by a factor of two. As a result, it is recommended to use the supercapacitor at the lowest temperatur ...
Type CP Reverse Phase Relay Instruction Leaflet
... operating near full load or a motor connected in parallel with substantial static load will not be able to maintain near normal open-phase voltage.) Where the high voltage contact supervises supply breaker closing, it must be set lower than normal voltage. For example, set the high-voltage contact a ...
... operating near full load or a motor connected in parallel with substantial static load will not be able to maintain near normal open-phase voltage.) Where the high voltage contact supervises supply breaker closing, it must be set lower than normal voltage. For example, set the high-voltage contact a ...
Design Optimization of High Frequency Transformer for Dual Active
... leakage inductance and the phase-shifted angle between its terminal square wave voltages. As a result, there is always a trade-off between the leakage inductance and the phaseshifted angle when maximizing the power conversion. Additionally, at high switching frequency, high AC losses in the HFT wind ...
... leakage inductance and the phase-shifted angle between its terminal square wave voltages. As a result, there is always a trade-off between the leakage inductance and the phaseshifted angle when maximizing the power conversion. Additionally, at high switching frequency, high AC losses in the HFT wind ...
Complete Paper
... components and cooling devices usually occupy a much larger space than semiconductor devices in power electronics building block. It is well known that when many DGs are connected to utility grids, they can cause problems such as voltage rise and protection problem in the utility grid. To solve thes ...
... components and cooling devices usually occupy a much larger space than semiconductor devices in power electronics building block. It is well known that when many DGs are connected to utility grids, they can cause problems such as voltage rise and protection problem in the utility grid. To solve thes ...
Stepper motor
A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed.Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.