Transformer and rectifier share

All, I posted this question over at plcs.net, and didn't really get a good answer so I'm asking here: My transformer and rectifier math for 3-phase supply is a bit rusty. I'm looking to design a nominal 70VDC power supply for a large number of servos. They require 75VDC, but with the number of servos I'm looking to run, the factory-supplied power supplies will consume too much room in the control cabinet, and be too heavy. I'm looking at building a DC supply using: (3) 1kva 48VAC secondary transformers wired together with a delta secondary (fed from a 208VAC 3-phase source) (1) 3-phase, 60A bridge rectifier module (2) 18,000uF filter caps The transformers are rated at 234VAC primary, 48VAC secondary; if I feed this power supply from 208VAC, that should give me a ~42VAC secondary voltage. I will rectify the outputs of the transformers, and if my math is right, I should get 42V x 1.65 = ~70VDC. With filtering caps, I should have a fairly solid DC supply. The servos have a 90VDC max rating, so I have plenty of headroom. Is my math correct to derive my peak DC voltage, using the 1.65 multiplication factor for bridge rectified 3-phase voltage? Nominal DC voltage should be close to peak, with adequate filtering, yes? My math came from this equation: I'm also slightly unclear on what my ultimate capacity of the power supply will be; if the transformers' secondaries can each supply 20A, I should have 60A DC available, yes? I haven't done much power supply design with a three-phase...

A rectifier transformer is a transformer specially designed for rectification system, its principle is the same as that of an ordinary transformer, it is a kind of equipment for converting AC voltage according to the principle of electromagnetic induction. The transformer generally has primary and secondary windings that are independent of each other, and these two windings share an iron core. When the primary winding of the transformer is connected to the AC power supply, an alternating current flows through the winding to produce a magnetic potential, so there is an alternating magnetic flux in the closed core. The primary winding cuts the magnetic line of force, and an alternating current of the same frequency is induced in the secondary winding. The turns ratio of the primary and secondary windings of a transformer is equal to the voltage ratio. The Difference Between Rectifier Transformers and Power Transformers A transformer used to supply power to a rectifier is called a rectifier transformer. Rectifier transformers and power transformers are similar in operation (Faraday's law of electromagnetic induction), structure (consisting of two or more windings wound on a common core), and appearance (both are stationary electrical devices). There are, however, major differences between the two. 1. Power transformers have only three sinusoidal pulses in one cycle. Rectifier transformers can have up to 6 or 12 pulses in one cycle (i.e., equivalent number of phases). 2.Power ...

They are combined with a diode or thyristor rectifier. Applications range from large aluminum electrolysis to medium size operations. The transformers may have a built-in or separate voltage regulation unit. Regulating and rectifier transformer combinations that are applied to primary aluminum production (smelters) are commonly known as 'rectiformers'. A typical aluminum potline is built as a 60-pulse system with five parallel 12-pulse rectiformers, each with different phase-shift windings; a 60-pulse system can be achieved by the following phase shift angles: –12°, –6°, 0°, +6° and +12°. As mentioned, one of the characteristics of rectiformers for aluminum plants is a very large regulating voltage range, from 0 Volts up to potentially 2,000 Volts (DC), depending on how many pots are connected in series. The rectifier technologies employed in industrial applications are commonly known as double star (DSS) or double bridge (DB). DSS systems use an interphase transformer and are predominately applied as 6- or 12-pulse units where high currents are required with very low nominal voltages. DB systems are applied as 6-, 12-, 24-, 48- or 60-pulse systems, as required to suit the harmonic mitigation and process stability requirements. A higher number of pulse groups can be applied but tend to be less commercially attractive Rectiformers can be supplied as a single tank solution for applications up to a rating of approximately 160 MVA, but for larger ratings transport limitations ...

Table of Contents • • • • • • What is the difference between a transformer and rectifier? A transformer rectifier is a type of transformer that contains thyristors or diodes within a single tank. It may also include voltage regulation. It is highly beneficial for processes in industries that necessitate a large supply of direct current (DC). What’s the difference between a rectifier and a power supply? A Rectifier converts AC (alternating current) to DC (direct current). The rectifier circuit takes alternating current (AC) and converts it into a positive direct current (DC) output. Power supply includes AC power supply and DC power supply. … What is the difference between a rectifier and a diode? A diode is a switching device, while a rectifier is generally used for the conversion of AC voltage to DC voltage. A diode allows the flow of current only when it is forward biased. The diode blocks the reverse flow of current. A rectifier, on the other hand, consists of a transformer, a diode, and a filter circuit. Can an inverter be used as a rectifier? Inverters are electronic devices that are used for the alternating current supply. They convert direct current (DC) into alternating current (AC). Inverters as well as rectifiers are used in all fields of industry, power engineering, telecommunications and railways. … Can a rectifier convert DC to AC? Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power tr...

Quarterly Result (All Figures in Cr.) PARTICULARS Mar 2022 Jun 2022 Sep 2022 Dec 2022 Mar 2023 Net Sales 328.01 277.71 309.84 319.53 425.47 Total Expenditure 311.22 257.36 279.67 292.14 397.62 Operating Profit 16.79 20.35 30.17 27.39 27.85 Other Income 5.16 2.04 2.45 4.5 2.87 Interest 13.11 9.75 13.21 12.06 11.61 Depreciation 3.03 3.62 3.66 8.84 6.45 Exceptional Items 0 0 0 0 0 Profit Before Tax 5.81 9.02 15.75 10.99 12.66 Tax 2.46 3.14 5.21 -0.86 3.84 Profit After Tax 3.35 5.88 10.54 11.85 8.82 Adjusted EPS (Rs) 0.25 0.44 0.79 0.89 0.67 Profit & Loss (All Figures in Cr. Adjusted EPS in Rs.) PARTICULARS Mar 2018 Mar 2019 Mar 2020 Mar 2021 Mar 2022 Net Sales 684.94 832.82 683.06 726.86 1122.58 Total Expenditure 626.91 775.48 636.92 663.36 1062.9 Operating Profit 58.04 57.34 46.15 63.5 59.68 Other Income 6.98 12.44 16.95 9.82 18.86 Interest 43.45 44.9 44.46 44.92 42.27 Depreciation 14.7 16.97 17.93 17.67 15.31 Exceptional Items 0 0 0 0 0 Profit Before Tax 6.87 7.92 0.71 10.74 20.96 Tax 2.51 2.97 0.17 3.79 7.93 Net Profit 4.36 4.95 0.54 6.95 13.03 Adjusted EPS (Rs.) 0.33 0.37 0.04 0.52 0.98 Balance Sheet (All Figures are in Crores.) Particulars Mar 2018 Mar 2019 Mar 2020 Mar 2021 Mar 2022 Equity and Liabilities Share Capital 13.26 13.26 13.26 13.26 13.26 Total Reserves 308.44 313.59 314.3 321.31 333.98 Borrowings 32.46 26.57 41.07 66.17 54.42 Other N/C liabilities 3.32 9.99 11.72 13.74 17.9 Current liabilities 698.06 476.21 520.89 480.56 654.13 Total Liabilities 1055.55 839.6...