What is the difference between PSR and SSR?
SSRs may be used as interrogators for passive MLAT/WAM arrays. Requires much less power to achieve the desired range, in comparison to PSR. This is because the transmitted signal only needs to reach the aircraft, while the PSR needs to emit a signal strong enough to reach the aircraft and travel back to the antenna.
Can AC SSR be used for DC?
In general, the AC output SSRs can also be used for DC. Output ratings span a wide range of a few volts or amperes to tens and hundreds of volts or amperes.
What is primary side regulation?
Primary-Side Regulation Due to transformer characteristics, this auxiliary transformer output is directly related to the converter’s output voltage. This is especially useful in high-voltage applications, because it reduces the isolation voltage requirements of the components, which also has lowers total cost.
What is SSR code in aviation?
special service request code
When a traveler requests special assistance, the airline codes that into their ticket record using a special service request code, or SSR. These codes allow airlines to easily keep track of assistance requests and assign staff accordingly.
What is a SSR transponder?
Secondary surveillance radar (SSR) is a radar system used in air traffic control (ATC), that unlike primary radar systems that measure the bearing and distance of targets using the detected reflections of radio signals, relies on targets equipped with a radar transponder, that reply to each interrogation signal by …
How do SSR fail?
If an ambient temperature exceeds the rated value, the SSR output elements may be damaged. If the SSR is used with loose screws of its output terminals or imperfect solder, abnormal heat generation while current flowing causes the SSR to burn out. Perform the proper wiring and soldering.
What is PSR in electrical?
The Trainnet® Compact Power Supply Unit (PSR) is a highly reliable switching mode power supply module. It takes power directly from the train batteries. The Trainnet® PSR module is primarily designed to power the Trainnet® RIOM but can also be used for some simple VMEbus systems.
What is the secondary side of a transformer?
Output Connections – The output side or secondary side of the transformer is where the electrical power is sent to the load. Depending on the requirement of the load, the incoming electric power is either increased or decreased.
What is an SSR code?
When a traveler requests special assistance, the airline codes that into their ticket record using a special service request code, or SSR. These codes allow airlines to easily keep track of assistance requests and assign staff accordingly.
What’s the difference between SSR and PSR control?
So you can easily get load regulation within ±1% if you used the SSR control law. Compared to an SSR topology, the PSR control method eliminates the optocoupler and compensated components (as shown in Figure 4). The magnetic field in the transformer provides the feedback.
Why are EMR relays not used in SSR?
In some special applications that requires low power factor, the switch must be stable and not subject to vibration, so EMR relays cannot be used either. The mechanical structure causes the mechanical relay to generate a large amount of electromagnetic interference (EMI) signals during switching period.
How does a high voltage switcher use PSR?
That high-voltage switcher integrates a high-voltage power FET plus a controller that uses PSR, supporting magnetically sensed output voltage regulation via the transformer bias winding. The sensing eliminates the need for a secondary-side reference, error amplifier and optical isolator for output-voltage regulation.
What kind of DCM does a PSR controller use?
And because most PSR controllers use “knee point sampling” for feedback, the controller only operates in discontinuous conduction mode (DCM). The output voltage ripple will be higher than in continuous conduction mode (CCM).