收藏本站
Basics
2.4.1
Flyback Converter
Flyback converters enable wide distribution of "low" power. Up to now, flyback converters
have only been used in power supply units with up to 200 W, approximately. Thanks to
more powerful components with reduced power dissipation, flyback converters can now be
used for power supply units with an output power of up to 1000 W, approximately.
Flyback converters are categorized according to the number of power switches used. Up
to 200 W, flyback converters require one power switch. Up to 1000 W, each flyback
converter uses two power switches.
Flyback converters consist of a smaller number of components than forward converters.
For this reason, devices with flyback converters have a light and small design and operate
particularly reliable.
Therefore, all QUINT POWER, MINI POWER and STEP POWER power supply units from
Phoenix Contact are designed as flyback converters. They cover a performance range
from 15 W to 960 W.
Method of Operation
Figure 2-12 shows the simplified structure of a flyback converter with one power switch.
The power switch S1 is switched on and off by means of a controller with the control
voltage U ctrl . The value of the output voltage U out depends on the winding factor of the
transformer Tr and the pulse duty factor of switch S1. The value of the output voltage U out
is continuously measured and transmitted to the controller. In this way, a stabilized output
voltage U out is generated.
Because of the switching process the energy transport in the flyback converter is carried
out in two steps. For easier understanding, the procedures are illustrated in two different
graphics.
Figure 2-12 shows the circuit with switch S1 closed. During this operating cycle an amount
of energy is taken from the supplying network and stored in the transformer Tr.
Figure 2-13 shows the circuit with switch S1 opened. The energy stored in the transformer
is passed on to the secondary circuit.
The corresponding characteristic curves of the voltage and current are shown in
Figure 2-14.
5598_en_03
PHOENIX CONTACT
2-15
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
2938853 DIN RAIL POWER SUPPLY 24VDC 5A
2938866 POWER SUPPLY 10A 24VDC
2938879 POWER SUPPLY 40A 100-240AC 24DC
2938976 POWER SUPPLY 20A 100-240AC 48DC
299D225X0025AB1 CAP TANT 2.2UF 25V 20% RADIAL
2AC109 SWITCH DOOR ROD SPDT 15A SCREW
2AC110 SWITCH DOOR ROD SPDT 15A QC
2AC19 SWITCH DOOR ROD SPDT 15A SCREW
相关代理商/技术参数
2938853 功能描述:DIN导轨式电源 QUINT 24VOLT 5AMP RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W
2938860-2 制造商: 功能描述: 制造商:undefined 功能描述:
2938866 功能描述:DIN导轨式电源 QUINT100-240AC/24DC 24VDC 10A RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W
2938879 功能描述:DIN导轨式电源 QUINT 24VOLT 40AMP RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W
2938905 制造商:Phoenix Contact 功能描述:Primary Switched-Mode Power Supply
2938918 功能描述:DIN导轨式电源 100-240AC 5DC 4A RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W
2938921 功能描述:DIN导轨式电源 100-240AC 12DC 3A RoHS:否 制造商:Mean Well 产品:Linear Supplies 商用/医用:Commercial 输出功率额定值:960 W 输入电压:180 VAC to 264 VAC, 254 VDC to 370 VDC 输出端数量:1 输出电压（通道 1）:48 V 输出电流（通道 1）: 输出电压（通道 2）: 输出电流（通道 2）: 输出电压（通道 3）: 输出电流（通道 3）: 尺寸:150 mm L x 110 mm W
293893-000 制造商:TE Connectivity 功能描述:RD16A20-31-S9-00