データシートサーチシステム |
|
GS-D200S データシート(PDF) 9 Page - STMicroelectronics |
|
GS-D200S データシート(HTML) 9 Page - STMicroelectronics |
9 / 17 page 9/17 Figure 10: Two-Phase-on (Normal Mode) Drive Figure 11: One-Phase-on (Wave Mode) Drive RESET, ENABLE AND HOME SIGNALS The RESET is an asynchronous reset input which restores the module to the home position (state 1 : ABCD = 0101). Reset is active when low. The HOME output signals this condition and it is intended to be ANDed with the output of a mechani- cal home position sensor. The ENABLE input is used to start up the module after the system initialization. ENABLE is active when high or unconnected. MOTOR CURRENT REGULATION The two bipolar winding currents are controlled by two internal choppers in a PWM mode to obtain good speed and torque characteristics. An internal oscillator supplies pulses at the chopper frequency to both choppers. When the outputs are enabled, the current through the windings raises until a peak value set by Ioset and Rsense (see the equivalent block diagram) is reached. At this moment the outputs are disabled and the current decays until the next oscillator pulse arrives. The decay time of the current can be selected by the CONTROL input (pin 10). If the CONTROL input is kept high or open the decay is slow, as shown in fig. 12, where the equivalent power stage of GS- D200, the voltages on A and B are shown as well as the current waveform on winding AB. When the CONTROL input is forced low, the decay is fast as shown in fig. 13. The CONTROL input is provided on GS-D200 and GS-D200S to allow maximum flexibility in applica- tion. If the modules must drive a large motor that does not store much energy in the windings, the chopper frequency must be decreased: this is easily ob- tained by connecting an external capacitor between OSC pin and GND1. In these conditions a fast decay (CONTROL LOW) would impose a low average current and the torque could be inadequate. By selecting CONTROL HIGH, the average current is increased thanks to the slow decay. When the GS-D200S is used in the fast-decay mode it is recommended to connect external fast recovery, low drop diodes between each phase output and the supply return (GND). The slow-de- cay should be the preferred operating recirculation mode because of the lower power dissipation and low noise operations. GS-D200/GS-D200S |
同様の部品番号 - GS-D200S |
|
同様の説明 - GS-D200S |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |