Production and sale of power supply units BPS BPN BPI and charger devices in Moscow

POWER SUPPLIES

LLC Sander Electronics offers to your attention certified POWER SUPPLIES own production. We produce stabilized power supplies – BPS, unstable power supplies – BPN, and alternating voltage power supplies – BP. Thanks to our own complete closed production cycle in Moscow, we have promptness, independence, low cost, proximity to the customer and flexibility.

Our company can make Power blocks according to customer parameters (within the output power).

If you have not found the option you need on our website, then you can send TK by email. mail.

To order power supplies and other products, it is necessary to send an application to the email. mail: [email protected] or [email protected]
In the application, you need to specify the parameters of the power supply ? Volt? Ampere , stabilized, unstabilized or alternating current,
The internal and external dimensions of the plug (for example 5.5×2.5) and polarity (in the center + or -), amount
and other information (if you need a non -standard cord length, a heat -guide, etc.).
When ordering alternating current power supplies, polarity does not need to be indicated.

Stabilized power supply sources of BPS	PRICE LIST
Unlucky power supply sources of BPN	PRICE LIST
A variable voltage adapters	PRICE LIST
Impulse power sources BPI	PRICE LIST
Universal power supply units UBP	PRICE LIST
Power supply units for LEDs	PRICE LIST
Power blocks	PRICE LIST
Power supply plugs	On request

Our Power supplies made on the basis of Transformers series TP, TPS own production and corporate building Sander Under the euro -zeta, as well as with any parameters and components to order, in various outlet, floor and wall buildings with a capacity of up to 200 watts.

Our company also produces Power supplies With additional devices for television, antenna and other equipment. The photo below shows BPN1 18 in 0.3 A with an injector. The connection of the power supply and injector is sealed.

With prices on Power supplies You can find on the page: Price list

The number after each designation BPS, BPN, BP denotes Corps numberin which this power supply is produced. You can find the appearance of the housings on the page: The appearance of power supply and overall dimensions

Made by us Power supplies They can be equipped with various plugs and connectors. The price list is indicated The cost of power supply Without a plug. At the request of the customer, we can make power supply in metal housings. The cost of manufacturing such blocks will be calculated individually for each order, depending on the power of the power supplies, the thickness of the material, the overall size and the complexity of the manufacture of the housing.

In addition to the proposed assortment of power supplies, we suggest familiarizing ourselves with the following information : Plug , Metal cases

Secondary power supply – This is a device designed to ensure power supply by electric energy, with compliance with the requirements of its parameters: voltage, current, etc. By converting energy of other power sources. According to GOST R 52907-2008, the word secondary is lowered. Source source can be integrated in the general scheme and made in the form of a module (power supply, power racks, etc.), or even located in a separate room.

Secondary power source tasks

Ensuring power transmission – The power source should ensure the transfer of a given power with the least losses and compliance with the specified characteristics at the output without harm to oneself. Usually the power of the power source is taken with some margin.

Transformation of the voltage form – converting alternating voltage into constant, and vice versa, as well as the transformation of the frequency, the formation of voltage pulses, etc. Most often it is necessary to transform the alternating voltage of the industrial frequency into constant.

Transformation of the voltage – Both increase and decrease. Often you need a set of several stresses of various sizes for nutrition of various circuits.

Stabilization – voltage, current and other parameters at the output of the power source should lie within certain limits, depending on its purpose in the influence of a large number of destabilizing factors: changes in the voltage at the input, load current, etc. Most often you need to stabilize the voltage at the load, however, however, however, however, however. Sometimes (for example, for charging batteries), current stabilization is necessary.

Protection -the voltage, or the load current in case of a malfunction (for example, short circuit) of any circuits may exceed the permissible limits and remove the electrical appliance, or the power supply itself. Also, in many cases, protection against passage of current along the wrong path is required: for example, passing current through the Earth when a person is touching or an extraneous object to live parts.

Galvanic interchange of chains – One of the measures of protection against current flow along the wrong path.

Adjustment -During operation, a change in any parameters may be required to ensure the proper operation of the electrical appliance.

Control -may include adjustment, turning on/off any circuits, or a power source in general. It can be either direct (using the controls on the device case), as well as remotely, as well as software (ensuring inclusion/off, adjustment at a given time or with the onset of any events).

The control – display of parameters at the input and output of the power source, switching on / off circuits, operation of protections. It can also be direct or remote.

Most often, secondary power sources are faced with the task of converting electricity from an industrial frequency alternating current network (for example, in Russia – 220 V 50 Hz, in the USA – 120 V 60 Hz).

The two most typical designs are transformer and switching power supplies.

The classic power supply is transformer power supply. In the general case, it consists of a step-down transformer or autotransformer, in which the primary winding is designed for mains voltage. Then a rectifier is installed that converts the AC voltage to DC (pulsating unidirectional). In most cases, the rectifier consists of a single diode (half-wave rectifier) ​​or four diodes forming a diode bridge (full-wave rectifier). Other circuits are sometimes used, such as in voltage doubling rectifiers. After the rectifier, a filter is installed that smooths out oscillations (ripples). Usually it is just a large capacitor.

Also, high-frequency noise filters, surges (varistors), short-circuit protection, voltage and current stabilizers can be installed in the circuit.

Transformer dimensions

There is a formula that can be easily derived from the basic laws of electrical engineering (and even Maxwell's equations):

(1 / n) ~ f × S × B

where n – the number of turns per 1 volt (on the left side of the formula is the EMF of one turn, which is the derivative of the magnetic flux according to Maxwell's equation, the flux is something in the form sin (f × t)), f – AC voltage frequency, S – cross-sectional area of ​​the magnetic circuit, B is the induction of the magnetic field in it. The formula describes the amplitude B, not an instantaneous value.

Value B in practice, it is limited from above by the occurrence of hysteresis in the core, which leads to remagnetization losses and overheating of the transformer.

If we accept that f there is a mains frequency (50 Hz), then the only two parameters available for selection when designing a transformer are S and n. Heuristics adopted in practice n = (from 55 to 70) / S in cm².

Increase S means an increase in the dimensions and weight of the transformer. If we go down the path S, this means an increase n, which in a small transformer means a reduction in the cross section of the wire (otherwise the winding will not fit on this core).

Increase n and a decrease in cross section means a strong increase in the active resistance of the winding. In low-power transformers, where the current through the winding is small, this can be neglected, but with increasing power, the current through the winding increases and, with a high resistance of the winding, dissipates significant thermal power on it, which is unacceptable.

The above considerations lead to the fact that at a frequency of 50 Hz, a transformer of large (from tens of watts) power can be successfully implemented only as a device of large size and weight (along the way of increasing S and wire cross-sections with reduction n).

Therefore, in modern PSUs go along a different path, namely along the path of raising f, that is, the transition to impulse power supplies. Such power supplies are many times easier (and the main part of the weight falls on the shielding cage) and significantly less dimensions than classic ones. In addition, they are not demanding on the input voltage and frequency.

Advantages of transformer PSU.

· The availability of the element base.

· The absence of the radio interference created (in contrast to impulse, creating interference due to harmonic components).